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Aplinkos inžinerijos fakultetas Padaliniai Aplinkos apsaugos ir vandens inžinerijos katedra Studijos Baigiamųjų darbu anotacijos
 Pasirinkite metus 2020 2019 2018
 2020 metų bakalauro baigiamųjų darbų anotacijos
 Robertas Mingaila
 Aplinkosauginių įrenginių diegimas šaldytuvų perdirbimo įmonėje
 Baigiamajame darbe aprašytas objektas, kuriame planuojama vykdyti šaldytuvų ir kitos šaldymo įrangos perdirbimo ūkinę veiklą. Apibūdinta numatoma naudoti šaldytuvų atliekų perdirbimo linija, susidarantys galutiniai produktai ir atliekos. Paminėtos didžiausios šaldymo įrangos atliekas perdirbančios, Lietuvoje ir Europos Sąjungoje veikiančios, įmonės. Aprašytas teisinis šaldytuvų perdirbimo veiklos reglamentavimas. Išanalizuotas šaldytuvų atliekų ir jų tvarkymo procesų poveikis aplinkos orui, vandeniui, dirvožemiui. Aptarti numatomos ūkinės veiklos susidarančių atliekų bei teršalų kiekiai. Nustatyta planuojamos ūkinės veiklos numatoma fizinė triukšmo tarša. Apskaičiuotas sanitarinės apsaugos zonos dydis. Aprašyta šaldytuvų sandara, jų veikimo principas, šaltnešio savybės bei perdirbimas. Aprašyta šaldytuvo būvio ciklo analizė. Nustatytos energijos sąnaudos, reikalingos vienam šaldytuvui perdirbti. Pasiūlytos švaresnės oro taršą mažinančios (rankovinis filtras), švarią energiją gaminačios (monokristalinių fotovoltinių elementų modulynas) bei triukšmo taršą mažinančios (betoninė triukšmą slopinanti sienelė) priemonės. Atlikti rankovinio filtro, monokristalinių fotovoltinių elementų modulyno bei betoninės triukšmą slopinančios sienelės aplinkosauginiai – inžineriniai bei aplinkosauginiai – ekonominiai skaičiavimai. Darbą sudaro šios dalys: turinys, paveikslų sąrašas, lentelių sąrašas, santrumpų sąrašas, įvadas, bendros žinios apie objektą, objekto planuojamos ūkinės veiklos poveikis aplinkai, švarios gamybos principų taikymas šaldytuvų perdirbimo įmonėje, aplinkosauginiai – inžineriniai skaičiavimai, aplinkosauginiai – ekonominiai skaičiavimai, išvados, rekomendacijos, literatūros sąrašas ir priedai. Darbo apimtis – 59 puslapiai be priedų, 12 lentelių, 33 paveikslai, 66 literatūros šaltiniai. Atskirai pridedami priedai: situacijos planas, generalinis planas, technologinė schema, rankovinio filtro, monokristalinių fotovoltinių elementų modulyno bei betoninės triukšmą slopinančios sienelės inžineriniai brėžiniai.
 Raktiniai žodžiai: Šaldymo įrangos perdirbimas, švarios gamybos principai, šaldytuvo sąndara, šaldytuvo veikimo principas, triukšmą slopinanti sienelė, monokristaliniai fotovoltiniai saulės elementai, rankovinis filtras.
 In this Bachelor Graduation paperwork, the main subject is installation of environmental protection equipment in the planned refrigerator recycling plant. The paperwork describes the object where it is planned to carry out economic activities for the processing of refrigerators and other refrigeration equipment. Describes the intended use of refrigerator waste, recycling line, generated end products and waste. The impact of refrigerator waste and its management processes on ambient air, water and soil was analyzed. The quantities of waste and pollutants generated by the planned economic activity are discussed. The expected physical noise pollution of the planned economic activity has been determined. The size of the sanitary protection zone has been calculated. The structure of refrigerators, their operating principle, refrigerant properties and recycling are described. Refrigerator life cycle analysis is described. The energy consumption required to recycle one refrigerator has been determined. Cleaner air pollution abatement (sleeve filter), clean energy production (solar panel) and noise pollution abatement (concrete noise barrier) measures have been proposed. Environmental – engineering and environmental – economic calculations of the sleeve filter, solar panel and concrete noise barrier were performed. The work consists of the following parts: content, list of figures, list of tables, list of abbreviations, introduction, general knowledge about the object, environmental impact of the planned economic activity, application of clean production principles in the refrigerator processing plant, environmental – engineering calculations, environmental – economic calculations, conclusions, recommendations, bibliography and appendices. Thesis consists of: 59 pages without appendixes, 12 tables, 33 figures, 66 references. Attachments are attached separately: situation plan, general plan, technological scheme, engineering drawings of the sleeve filter, solar panel and concrete noise barrier.
 Raktiniai žodžiai: Refrigeration equipment recycling, clean production principles, refrigerator structure, refrigerator operation principle, noise-absorbing wall, monocrystalline photovoltaic solar panel, sleeve filter.
 Lukas Kucevičius
 Aplinkosauginių priemonių taikymas kelyje Kirtimai - Pagiriai - Baltoji Vokė
 Baigiamajame darbe įvertintas valstybinės reikšmės krašto kelio Nr. 202 Kirtimai–Pagiriai–Baltoji Vokė poveikis aplinkai: nustatytos aplinkos oro teršalų emisijos, apskaičiuotas eismo sukeliamas triukšmo lygis, nustatytas neigiamas poveikis vandenų būklei bei susidarančios atliekos. Aptarti sprendimai avaringiems ir pavojingiems ruožams, eismo saugumo priemonių projektavimas keliuose bei pateikiami užsienio šalių eismo saugumo gerinimo gerosios praktikos pavyzdžiai. Išnagrinėti projektuojami aplinkosauginiai įrenginiai – šviestuvas su saulės elementu ir vėjo jėgaine, triukšmo užtvara ir naftos gaudyklė. Atlikti projektuojamų aplinkosauginių aplinkosauginiai – inžineriniai ir aplinkosauginiai – ekonominiai skaičiavimai. Baigiamojo darbo dalys: paveikslų sąrašas, lentelių sąrašas, santrumpų sąrašas, įvadas, bendros žinios apie kelią Kirtimai–Pagiriai–Baltoji Vokė, kelio Kirtimai–Pagiriai–Baltoji Vokė poveikis aplinkai, aplinkosauginių bei eismo saugumo priemonių taikymas kelyje Kirtimai–Pagiriai–Baltoji Vokė, aplinkosauginiai – inžineriniai skaičiavimai, aplinkosauginiai – ekonominiai skaičiavimai, išvados, rekomendacijos, literatūra, priedai. Darbo apimtis – 42 puslapiai be priedų, 15 paveikslų, 8 lentelės, 47 literatūros šaltiniai. Atskirai pridedami priedai: situacijos bei generaliniai planai, technologinė schema, triukšmo užtvaros, šviestuvo su saulės elementu ir vėjo jėgaine ir naftos gaudyklės inžineriniai brėžiniai.
 Raktiniai žodžiai: Krašto kelio Nr. 202 Kirtimai–Pagiriai–Baltoji Vokė, poveikis aplinkai, eismo saugumas, šviestuvas su saulės elementu ir vėjo jėgaine, triukšmo užtvara, naftos gaudyklė.
 In Bachelor Gradution paperwork the main subject is the State road No. 202 Kirtimai – Pagiriai – Baltoji Vokė environmental impact: emissions of air pollutants, traffic noise level, negative impact on water status and waste generation. Solutions for dangerous road sections, design of traffic safety measures on roads and examples of good practice in improving traffic safety in foreign countries are discussed. The designed environmental technologies – wind-solar hybrid streetlight, noise barriers and an oil separator - were examined. Environmental - engineering and environmental - economic calculations were performed. Paperworks structure: list of figures, list of tables, list of abbreviations, introduction, general knowledge about the road Kirtimai – Pagiriai – Baltoji Vokė, environmental impact of the road Kirtimai – Pagiriai – Baltoji Vokė, application of environmental and traffic safety measures on the road Kirtimai – Pagiriai – Baltoji Vokė, environmental - engineering calculations, environmental - economic calculations, conclusions, recommendations, literature, appendices. Thesis consists of: 42 pages without appendixes, 15 figures, 8 tables, 47 references. Appendixes included: situation and general plans, technological scheme, noise barrier, wind-solar hybrid streetlight and oil separator drawings.
 Raktiniai žodžiai: State Road No. 202 Kirtimai – Pagiriai – Baltoji Vokė, environmental impact, traffic safety, wind-solar hybrid streetlight, noise barrier, oil separator.
 Ingrida Veličkaitė
 AB Kaišiadorių paukštyno aplinkosauginės būklės vertinimas ir gerinimas
 Baigiamajame bakalauro darbe „AB „Kaišiadorių paukštynas“ aplinkosauginės būklės vertinimas ir gerinimas“ išnagrinėtas įmonės daromas poveikis aplinkai ir pasiūlytos trys aplinkos būklės gerinimo technologijos. Skyriuje „Bendrosios žinios apie AB „Kaišiadorių paukštynas“ aprašyta įmonės politika, situacija, jos gaminama produkcija, gamybos technologiniai procesai, naudojami ištekliai, energijos bei vandens ištekliai ir jų panaudojimas. Skyriuje „AB Kaišiadorių paukštynas“ vykdomos veiklos poveikis aplinkai“ išanalizuotas įmonės poveikis aplinkai: į aplinkos orą išmetami teršalai, gamybos metu susidarančios atliekos, vandens ir fizinė tarša, dirvožemio ir kraštovaizdžio apsauga. Taip pat įvertinta įmonės sanitarinė apsaugos zona. Skyriuje „Geriausiai prieinami gamybos būdai AB „Kaišiadorių paukštynas“ aprašomi geriausiai prieinami gamybos būdai. GPGB rekomendacijose kvapams mažinti numatomos priemonės: mėšlo kaupimas dengtoje mėšlidėje; dirbtinė ventiliacija, kurioje oras išleidžiamas per pakankamai aukštus kaminus vertikaliai aukštyn virš stogo. Atsižvelgus į paukštyno aplinkosauginę būklę, pasiūlytos trys technologijos, kurios sumažintų taršą. Išsiskiriančių amoniako, kietųjų dalelių ir LOJ kiekiams mažinti atitinkamai parinkti ciklonas ir biofiltras. Utilizacijos ceche susidarysiančiam sieros vandeniliui mažinti suprojektuotas bioskruberis. Skyriuje „Aplinkosauginiai – inžineriniai skaičiavimai“ atlikti skaičiavimai, kurie padės suprojektuoti įrenginius ir sužinoti, koks bus jų efektyvumas. Skyriuje „Aplinkosauginiai – ekonominiai skaičiavimai“ apskaičiuoti įmonės mokami mokesčiai už taršą bei įrenginių atsipirkimo laikas. Darbo pabaigoje pateikiamos išvados ir rekomendacijos įmonės aplinkosauginei būklei pagerinti, pridedamas naudotos literatūros sąrašas. Grafinę baigiamojo darbo dalį sudaro 6 A1 formato brėžiniai: situacijos planas, generalinis planas, technologinė schema, ciklono, biofiltro ir bioskruberio techniniai brėžiniai. Darbo apimtis – 50 p. teksto be priedų, 8 iliustr., 19 lent., 47 bibliografiniai šaltiniai.
 Raktiniai žodžiai: Paukštynas, ciklonas, biofiltras, bioskruberis.
 In final work “The Evaluation and Improvement of the Environmental Condition in SC “Kaisiadoriu Paukstynas” was analyzed impact on the environment, which makes SC “Kaisiadoriu Paukstynas”. Also it has been suggested three technologies, which could improve environmental condition. In “General information about the company” section was given information abou the company, it’s policy, situation, products, production processes, raw materials, energy and water resources and it’s consumption. In section called “Environmental impact of the company” was analyzed impact of the environment which company makes: emmisios of air pollutants, production waste, water and physical pollution, soil and landscape protection. There is also assessed sanitary protection zone. In section called “Best available techniques” was given best available techniques for intensive rearing of poultry, slaughterhouses and animal by-products production. In best available techniques for spread of odours reduce was suggested the accumulation of manure in the covered manure shed, artificial ventilation where the air would be released through the high enough chimneys vertically to the roof. According to environmental condition there was suggested three technologies that reduce pollution. For ammonia, particulates and volatile organic compounds reduce was suggested cyclone and biofilter. For hydrogen sulfide was suggested bioscuber. In “Environmental-engineering calculations” section was made engineering calculations which will help to design equipment and find out it’s efficiency. In section “Environmental-economic calculations” was calculated taxes which company pays for pollution payback time. At the end of work is given conclusions and recommendations for environmental condition improvement. List of references is given too. The graphical part of the thesis consists of 6 A1 drawings situation plan, general plan, technological scheme, cyclone, biofilter and bioscuber technical drawings. Thesis consist of: 50 p. text without appendixes, 8 pictures, 19 tables, 47 bibliographical entries.
 Raktiniai žodžiai: Poultry, cyclone, biofilter, bioscuber.
 Gabija Paulauskaitė
 „GP“ miesto vandentiekio ir nuotakyno bei vandens ruošyklos projektavimas
 doc. dr. Mindaugas Rimeika
 Baigiamąjame darbe projektuojami „GP“ miesto vandentiekio, buitinių nuotekų ir vandens ruošimo įrenginiai. Mieste gyvena 10403 vartotojai, taip pat veikia pramonės įmonė, nuotekų valykla. Įvertinus visus miesto vandens poreikius gauta, jog didžiausias suvartojamas vandens debitas per parą yra 2567 m3/d. Antrojoje darbo dalyje buvo apskaičiuota ir nustatyta, jog vanduo bus imamas iš antrojo vandeningojo sluoksnio. Suprojektuoti trys gręžiniai iš kurių vienas darbinis ir du atrarginiai. Vieno gręžinio našumas 107 m3/h. Taip pat suprojektuotas švaraus vandens rezervuaras, kurio tūris 2000 m3. Trečioje dalyje suprojektuoti „GP“ miesto vandens ruošimo įrenginiai manganui ir geležiai šalinti iš požeminio vandens. Įrenginių našumas 1903 m3/d. Vandens ruošimo įrenginių kompleksą sudaro du slėginiai aeratoriai, du kompresoriai, dvi orapūtės, keturi slėginiai filtrai, filtro plovimo vandens bei paplavų skaidrinimo rezervuarai, siurbliai, dozavimo siurbliai NaOCl tirpalui bei dozavimo talpos. Mieste suprojektuotas žiedinis ir šakotinis vandentiekio tinklas. Naudojantis „Bentley“ platformos programa „WaterCad“ buvo sukurtas hidraulinis vandentiekio modelis ir jo pagalba įvertinti didžiausios vandens suvartojimo valandos, gaisrų ir avarijų scenarijai, parinkti optimalūs vamzdžių skersmenys, antro kėlimo siurbliai. Taip pat apskaičiuotos energijos sąnaudos ir įvertintas vandens amžius vandentiekio tinkle. Atliktas nuotekų tinklo trasavimas (mieste projektuojamas savitakinis nuotakynas), hidraulinis skaičiavimas, parinkti vamzdynų skersmenys (DN200, DN250 ir DN300), nuolydžiai, nuotekų greičiai. Dėl sudėtingo „GP“ miesto reljefo suprojektuotos trys nuotekų siurblinės mieste ir viena nuotekų siurblinė perpumpuojanti miesto nuotekas tiesiai į nuotekų valyklą.
 Raktiniai žodžiai: Gręžiniai, švaraus vandens rezervuaras, vandens ruošimo įrenginiai, geležis, manganas, slėginiai aeratoriai, slėginiai filtrai, siurbliai, vandentiekio tinklas, nuotekų tinklas, nuotekų siurblinės
 Water and sewer networks and water treatment plant of „GP“ city are being designed in the final work. City has a population of 10403, as well as an industrial enterprise and wastewater treatment plant. After assessing all the water needs of the city, it was found that the maximum daily water flow is 2567 m3/d. In the second part, it was calculated and determined that water will be taken from the second aquifer. Three boreholes were designed, one of which is working and two others are reserved. The capacity of one borehole is 107 m3/h. Also a clean water reservoir which has volume of 2000 m3 was designed in the water treatment plant of „GP“ city. In the third part, water treatment plant for manganese and iron removal from groundwater was designed. Equipment capacity 1903 m3/d. The water treatment equipment complex consists of two pressure aerators, two compressors, two blowers, four pressure filters, filter washing water and clarification tanks, pumps, dosing pumps for NaOCl solution and dosing tanks. The circular and branched water supply network was designed in the town. Using the Bentley platform program WaterCad, a hydraulic water network model was developed and used to estimate maximum water consumption hours, fire and accident scenarios, select optimal pipe diameters, and second lift pumps. Energy consumption was calculated and water age in the water supply network was estimated. The tracing of the sewage network was done in final work (self-contained sewer system is designed in the city), hydraulic calculation, selected pipeline diameters (DN200, DN250 and DN300), slopes, sewage rates. Due to the complex relief of the „GP“ city four sewage pumping stations were designed in the city.
 Raktiniai žodžiai: Boreholes, clean water reservoir, water treatment plant, iron, manganese, pressure aerators, pressure filters, pumps, water supply network, sewage network, sewage pumping stations
 Neda Tauginaitė
 Aplinkosauginių įrenginių diegimas UAB „Girelės paukštynas“
 Baigiamajame bakalauro darbe nagrinėjamas biodujų gamybos ir valymo technologijų taikymas uždarojoje akcinėje bendrovėje „Girelės paukštynas“. Darbo tikslas – išanalizuoti UAB „Girelės paukštynas“ esamą įmonės situaciją, vykdomą veiklą, įvertinti šios įmonės poveikį aplinkai, pasiūlyti pritaikyti efektyvius aplinkosauginius įrenginius įmonės aplinkosauginės ir ekonominės būklės gerinimui. Pirmajame skyriuje pateikta paukštyno produkcijos bei technologinių procesų analizė. Antrajame skyriuje apžvelgtas paukštyno poveikis aplinkai, iškeltos pagrindinės darbo problemos: oro tarša, nemaloniais kvapais pasižyminčių teršalų, junginiai bei susidarantys biologiškai skaidžių atliekų kiekiai. Trečiajame skyriuje pateikiamas geriausių prieinamų gamybos būdų taikymas paukščių ūkyje, bei galimos priemonės spręsti oro taršos bei atliekų susidarymo problemas. Ketvirtajame skyriuje projektuojamos paukštynui siūlomos biotechnologijos: bioreaktorius – susidarančių biologiškai skaidžių atliekų apdorojimui; biofiltras – paukštyno aplinkoje susidarančių teršalų valymui; fotobioabsorberis – bioreaktoriuje pagamintų biodujų valymui. Penktajame skyriuje atliekami UAB „Girelės paukštynas“ aplinkosauginių–ekonominių mokesčių skaičiavimai, taip pat, įvertinamas projektuojamų įrenginių atsipirkimo laikas. Darbą sudaro 9 dalys: įvadas, bendrosios žinios apie paukštyną, vykdomos veiklos poveikis aplinkai, geriausių prieinamų gamybos būdų taikymas paukščių ūkyje, aplinkosauginių įrenginių skaičiavimas ir projektavimas, aplinkosauginių–ekonominių mokesčių skaičiavimas, išvados, rekomendacijos, naudotos literatūros sąrašas, grafinė dalis. Išnagrinėjus paukštyno veiklos poveikį aplinkai, bei pasiūlius galimus susidarančių problemų sprendimus, pateiktos baigiamojo darbo išvados ir rekomendacijos, naudotos literatūros sąrašas. Darbo apimtis – 92 p. teksto be priedų, 18 iliustracijų, 38 lentelės, 55 bibliografiniai šaltiniai, 6 grafinės dalies brėžiniai.
 Raktiniai žodžiai: Biodujos, Biofiltras, Biologiškai skaidžios atliekos, Bioreaktorius, Fotobioabsorberis, Mikrodumbliai.
 The application of biogas production and cleaning technologies in „Girelės paukštynas“ company is considered in the final bachelor thesis. The aim of the work is to investigate the causes of environmental pollution in the poultry farm „Girelės paukštynas“ and, based on the principles of sustainable development, to design modern air and gas purification technologies, as well as, biodegradable waste treatment technologies. The first chapter provides an analysis of poultry farm production and technological processes. The second chapter reviews the environmental impact of the poultry farm and the main problems of work: air pollution, contaminants with unpleasant odours, compounds and amounts of biodegradable waste. The third chapter describes the application of the best available techniques on the poultry farm and possible measures to address the problems of air pollution and waste generation. In the fourth chapter the following biotechnologies are proposed for the poultry farm: bioreactor – for the treatment of biodegradable waste generated in the poultry farm; biofilter – for air cleaning from barn air; photobioabsorber – for bioreactor biogas cleaning. In chapter five, the environmental and economic tax calculations are performed, as well as the estimated payback time of the projected equipment. The work consists of 9 parts: introduction, general knowledge of the poultry farm, the environmental impact of the company‘s activities, application best available techniques in the poultry farm, calculation and design of environmental equipment, calculation of environmental and economic taxes, conclusions, recommendations, references, graphic part. After examining the environmental impact of the activity of the poultry farm and proposing possible solutions to the problems arising, the conclusions and recommendations of the final work, the list of used literature are presented. Volume of thesis – 92 pages of text without annexes, 18 figures, 38 tables, 55 references and 6 drawings of the graphic part.
 Raktiniai žodžiai: Biogas, Biofilter, Biodegradable Waste, Bioreactor, Photobioabsorber, Microalgae.
 2020 metų magistro baigiamųjų darbų anotacijos
 Šviesos intensyvumo įtakos biodujų valymui panaudojant mikrodumblių kultūras eksperimentinis tyrimas ir vertinimas
 Baigiamajame magistro darbe yra nagrinėjama šviesos intensyvumo įtaka biodujų valymui, panaudojant vietines mikrodumblių kultūras. Šio eksperimentinio darbo tikslas buvo ištirti ir įvertinti biodujas veikiamų mikrodumblių CO2 valymo bei CH4 gryninimo efektyvumus veikiant skirtingo bangos ilgio ir intensyvumo šviesoms. Pirmajame skyriuje apžvelgta biodujų sudėtis ir joms valyti taikomi metodai, mikrodumblių panaudojimas biodujoms valyti, fizikiniai parametrai lemiantys mikrodumblių augimą, šviesos intensyvumo įtaka mikrodumblių augimui. Taip pat pateikti šviesos intensyvumo įtakos mikrodumblių augimui teoriniai tyrimai, konstrukcinių sprendimų mikrodumbliams apšviesti analizė ir mikrodumblių augimo priklausomybėms nuo šviesos intensyvumo modeliuoti taikomi metodai bei išvados. Antrajame skyriuje aprašyta mikrodumblių paruošimo šviesos intensyvumo tyrimams metodika, biodujų valymo efektyvumo tyrimo metodika, naudojant skirtingą šviesos intensyvumą ir bangos ilgį, matematinio modelio taikymas mikrodumblių kultūrų biodujų valymo trumpalaikei prognozei nuo šviesos intensyvumo nustatyti metodika bei išvados. Trečiajame skyriuje pateikti biodujų valymo efektyvumo eksperimentinių tyrimų rezultatai ir vertinimas, naudojant skirtingą šviesos intensyvumą ir bangos ilgį kartu su matematinio modelio taikymu mikrodumblių kultūrų biodujų valymo trumpalaikei prognozei nuo šviesos intensyvumo nustatyti eksperimentinių tyrimų rezultatus ir įvertinti. Išanalizavus praktinius mikrodumblių kultūrų valymo įrenginių metodus bei struktūras, atvaizdavus mikrodumblių kultūrų valymo efektyvumo rezultatus, buvo aprašytos bendrosios baigiamojo darbo išvados ir rekomendacijos, naudotos literatūros sąrašas. Darbą sudaro įvadas, 3 pagrindiniai skyriai skirti literatūrinei apžvalgai, biodujų valymo panaudojant mikrodumblių kultūras prie skirtingų šviesos bangos ilgių bei intensyvumų metodikoms, tyrimų ir modeliavimo rezultatams ir jų vertinimui, išvados, rekomendacijos, literatūros sąrašas. Darbo apimtis – 78 p. teksto be priedų, 34 iliustr., 5 lentelės ir 46 bibliografiniai šaltiniai.
 Raktiniai žodžiai: mikrodumblių kultūros, biodujos, biodujų valymas, šviesos intensyvumas, šviesos įtaka, eksperimentinis tyrimas, raudona šviesa, mėlyna šviesa, anglies dioksidas, metanas
 The influence of the light intensity for biogas cleaning using the local microalgae cultures is being discussed. An aim of this experimental work was to research and evaluate efficiencies of biogas CO2 cleaning and CH4 upgrading by microalgae while exposing them to different wavelength and intensity lights. In the first chapter, the biogas composition and its cleaning methods, microalgae usage for biogas cleaning, physical parameters affecting microalgae growth, light intensity influence on microalgae growth were discussed. The theoretical research of a light intensity influence on microalgae growth, analysis of structure solutions regarding microalgae enlightening as well as the used methods and conclusion of the modelling of light intensity influence on microalgae growth were also described. In the second chapter the methods of light intensity research of microalgae preparation, methods of the biogas cleaning efficiency research using different light intensity and wavelength, methods and conclusion of mathematical model application on microalgae culture biogas cleaning depending on light intensity short-term prediction were discussed. The third chapter listed the experimental research results and evaluation of the biogas cleaning efficiency using different light intensity and wavelength altogether with experimental research results and evaluation of the mathematical model application on biogas cleaning of microalgae cultures dependent of light intensity short-term prediction. After analyzing practical methods and structures of microalgae culture cleaning device, showing the efficiency results of the microalgae culture cleaning, the common conclusion of this paper, recommendations and literature source list were described. Thesis consists of introduction, 3 main chapters dedicated for literature review, for methods, research and modelling results and their evaluation of the biogas cleaning using microalgae cultures undergoing different wavelength and intensity lights, conclusion, recommendations and literature source list.
 Raktiniai žodžiai: microalgae cultures, biogas, biogas cleaning, light intensity, light influence, experimental research, red light, blue light, carbon dioxide, methane
 Artūrs Krastins
 Perėjimas nuo tradicinio prie teigiamą energijos balansą generuojančio bloko Rygos istoriniame centre: konceptualus pasiūlymas efektyvesnėms energijos vartojimo strategijoms
 Didėjant globalinio atšilimo rizikai, keliami didesni energijos vartojimo efektyvumo reikalavimai, o energijos vartojimo efektyvumo srityje keliami vis ambicingesni tikslai. Naujausi ES tikslai yra pasiekti klimato neutralumo tikslą iki 2050 m., Sukuriant mažai anglies dioksido į aplinką išskiriančią visuomenę. Teigiamos energijos bloko (PEB) idėja yra vienas iš mažai anglies dioksido į aplinką išskiriančių visuomenės ateities sprendimų. Aukšto efektyvumo pastatuose PEB naudoja energijos vartojimo efektyvumą, informacijos ir ryšių bei atsinaujinančiosios energijos technologijas ir pagamina daugiau energijos, nei sunaudojama per metus. Tačiau norint naudoti šią koncepciją esamų pastatų konstrukcijose, reikia susidurti su įvairiais apribojimais, ypač istoriniuose miesto centruose, kur reikalavimai didinti pastatų energijos vartojimo efektyvumą susiduria su apribojimais, kuriuos nustato Rygos istorinio centro apsaugos taisyklės. Magistro darbe analizuojami du teigiamos energijos blokų pastatuose sampratos scenarijai, naudojant tradicines ir novatoriškas technologijas, siekiant padidinti pastatų energinį efektyvumą, ir atsinaujinančios energijos technologijas, tinkančias miesto aplinkai. Viename scenarijuje prioritetas teikiamas kultūrinių ir istorinių vertybių išsaugojimui, kai siūlomi sprendimai atitinka esamą norminę bazę, kitame scenarijuje prioritetas teikiamas energijos vartojimo efektyvumo didinimui ir pastatų fondo dekarbonizavimui, kai siūlomi sprendimai skatina vertinti kultūros paveldo išsaugojimo praktiką. Straipsnyje nagrinėjama galimybė sumažinti išmetamo CO2 kiekį pagal siūlomus scenarijus, tokiu būdu leidžiant išanalizuoti, kaip šie sprendimai padeda įgyvendinti ES ilgalaikę 2050 m. Dekarbonizacijos strategiją ir klimato neutralumą istoriniame miesto centre.
 Raktiniai žodžiai: Teigiamos energijos blokas; Energijos bendrija; Atsinaujinantys energijos šaltiniai miesto aplinkoje; PEB; beveik nulio energijos pastatai; nZEB
 As the risks of global warming increase, energy efficiency requirements are set higher, and ever more ambitious targets are being set in the field of energy efficiency. The latest EU targets are to achieve the goal of climate neutrality by 2050 by creating a low-carbon society. The concept of a Positive Energy Block (PEB) is one of the solutions to the future of a low-carbon society. The PEB uses energy efficiency, information and communication and renewable energy technologies in high-performance buildings and produces more energy than it consumes per year. However, in order to use this concept in the structures of existing buildings, various constraints have to be faced, especially in historic city centres, where requirements to increase the energy efficiency of buildings face constraints imposed by the protection regulations of the historic centre of Riga. The master's thesis analyses two scenarios for the concept of the positive energy block in buildings, using traditional and innovative technologies to increase the energy efficiency of buildings and renewable energy technologies suitable for the urban environment. One scenario prioritizes the preservation of cultural and historical values, where the proposed solutions comply with the existing regulatory framework, the other scenario prioritizes the increase of energy efficiency and decarbonisation of building stock, where the proposed solutions encourage the evaluation of cultural heritage preservation practices. The paper examines the potential for reducing CO2 emissions according to the proposed scenarios, thus allowing to analyse how these solutions help to achieve the EU's long-term decarbonization strategy of 2050 and climate neutrality in the historic city centre.
 Raktiniai žodžiai: Positive Energy Block; Energy Community; RES in urban environment; PEB; nearly Zero Energy Buildings, nZEB
 Valerija Kostevica
 Purškimo parametrų įtakos rūko įrenginio energijos vartojimo efektyvumui tyrimas
 doc. dr. Raimondas Grubliauskas
 Purškimo parametrų įtakos rūko įrenginio energijos vartojimo efektyvumui tyrimas. Darbo autorė Valērija Kosteviča, darbo vadovė doc.dr. Ivaras Veidenbergas ir doc.dr. Raimondas Grubliauskas. Baigiamajame magistro darbe nagrinėtas rūko įrenginio energijos vartojimo efektyvumas ir purškimo parametrų poveikis jam, analizuotas teorinis skaičiavimo modelio veikimas lyginant su eksperimentiniais rezultatus. Šio darbo tikslas - atlikti rūko bloko efektyvumo modeliavimą ir nustatyti purškimo parametrų įtaką prietaiso energijos efektyvumui. Pagrindinės darbo užduotys: literatūros apžvalga apie esamas išmetamųjų dujų apdorojimo technologijas, parametrus, turinčius įtakos rūko vieneto veikimui, prietaiso lašelių elgseną, šilumos mainų procesus ir galimus šilumos nuostolius; rūko vieneto šilumos nuostolių eksperimentinis tyrimai ir skaičiavimai; vandens plėvelės ant rūko įrenginio sienelių eksperimentinis nustatymas ir duomenų analizė, rūko įrenginio skaičiavimo modelio duomenų palyginimas su eksperimentiniu būdu gautais duomenimis. Darbo naujumu galima laikyti novatoriškos išmetamųjų dujų valymo technologijos integravimo galimybių analizę mažuose energijos šaltiniuose ir vandens plėvelės įtakos kondensacinio mazgo veikimui nustatymą. Darbe buvo iškelta hipotezė: purškimo parametrai turi įtakos rūko įrenginio efektyvumui. Darbą sudaro vadovo užduotis, anotacija dviem kalbomis - lietuvių ir anglų kalbomis, turinys, darbe naudojamų figūrų sąrašas, darbe naudojamų lentelių sąrašas, darbe vartojamų terminų ir santrumpų sąrašas, įvadas, 3 pagrindiniai skyriai ir 13 poskyrių, išvadų ir rekomendacijų sąrašas, darbe naudotos literatūros sąrašas. Darbą sudaro 83 puslapiai, įskaitant 7 lenteles, 37 paveikslus ir 35 formules. Darbe panaudota 95 literatūros šaltinis ir pridedami 4 priedai.
 Raktiniai žodžiai: Kondensacinis įrenginys, rūko mazgas, išmetamųjų dujų apdorojimas, šilumos nuostoliai, lašeliai, purškimo kampas, šilumos srautas.
 Fog unit energy efficiency. Impact of spraying parameters. Author of work Valērija Kosteviča, scientific supervisor of work Dr.habil.sc.ing. Ivars Veidenbergs and Assoc.prof. Raimondas Grubliauskas. Within this master thesis fog unit energy efficiency is determined and spraying parameter impact on it is defined, calculation model performance is analysed and verified with experimentally obtained results. The aim of this work is to carry out modelling of fog unit efficiency and to determine how spraying parameter affect energy efficiency of device. Main tasks of the paper include: a literature review on existing flue gas treatment technology’s, parameters which affect fog unit performance, behaviour of the droplets in the device, the heat exchange processes and the potential heat losses in the apparatus; fog unit heat loss experimental determination and calculations; water film on fog unit walls experimental determination and data analysis, fog unit calculation model data comparison to experimentally obtained data. The novelty of the work can be considered analysis of integration possibilities of innovative flue gas cleaning technology in small energy sources and determination of water film impact on condensing unit performance. A hypothesis was put forward in the work: Spraying parameters affect fog unit efficiency. The work consists from the supervisor task, annotations in two languages - Lithuanian and English, a table of contents, a list of figures used in the work, a list of tables used in the work, a list of terms and abbreviations used in the work, introduction, 3 main chapters and 13 subdivisions, a list of conclusions and recommendations, a list of references used in the work. The work consists of 83 pages, including 7 tables, 37 figures and 35 equations. The work uses 95 sources of literature and 4 annexes are added.
 Raktiniai žodžiai: Condensing unit, fog unit, flue gas treatment, heat losses, droplets, spray angle, heat flow.
 Šaldytų uogų šalto tiekimo grandinės analizė ir modeliavimas: gyvenimo ciklu pagrįstas požiūris į Latvijos atvejo analizę
 Šaltojo tiekimo grandinė yra viena didžiausių pramonės šakų pasaulyje ir Europos Sąjungoje, taip pat pramonė, turinti nepaprastą poveikį aplinkai. Svarbu išsamiai suprasti įvairius šaltosios grandinės aspektus ir sukurti metodiką, kaip tinkamai įvertinti tiek pramonės poveikį aplinkai, tiek finansus. Tuo remiantis, šio magistro darbo tikslas yra sukurti metodiką, jungiančią gyvenimo ciklo analizės ir gyvenimo ciklo sąnaudų analizės metodikas. Užduočiai atlikti analizuojamas šaltalankių šaltojo tiekimo grandinės Latvijoje atvejo tyrimas. Šaltalankiai yra palyginti nauja ir besiformuojanti pramonė, kuri dėl technologinių priežasčių labai priklauso nuo šaltųjų grandinių. Pagrindinė išvada, daroma šiame magistro darbe, yra galimybė tuo pačiu metu analizuoti esamą šaltojo tinklo aplinkosauginį ir ekonominį įgyvendinamumą bei siūlomus sistemos tobulinimus. Taip pat aišku, kad reikalinga toliau tikrinti ir atlikti papildomus abiejų požiūrių sujungimo tyrimus.
 Raktiniai žodžiai: šaltojo tiekimo grandinė; gyvenimo ciklo analizės; gyvenimo ciklo sąnaudų analizės; šaltalankiai
 Cold supply chain is one of biggest industries in world and European Union, as well as industry with remarkable impact on environment. Cold chain is crucial in modern food supply chain, giving access to various food products over the globe through all the seasons. It is important in details to understand various aspects of cold chain and create methodology to properly address both environmental and financial impacts of given industry. On this basis the overall aim of master thesis is to create methodology to merge Life Cycle Analysis and Life Cycle Cost analysis. To perform the task, Latvian case study of sea-buckthorn cold supply chain is being analysed. The main conclusion arising from thesis is possibility to simultaneously analyse both environmental and economic feasibility of existing cold chain and suggested improvements in given system. It is also clear, that further research to properly merge both approaches is to be conducted.
 Raktiniai žodžiai: Cold supply chain, Life cycle assesment; life cycle cost analysis, sea-buckthorn
 Šilumos izoliacinių medžiagų taikymas istoriniuose pastatuose
 Šio magistro darbo autorius yra Rygos technikos universiteto aplinkos mokslų programos studentas Viesturs Balodis. Šio darbo pavadinimas yra „Šilumos izoliacinių medžiagų pritaikymas istoriniuose pastatuose“. Darbo tikslas – ištirti plytų mūro sienos su vidine izoliacijos higroterminius bandymus laboratorijoje bei procesų modeliavimą, siekiant įvertinti kintančių lauko sąlygų (vėjo, lietaus ir saulės reiškinių) įtaką. Magistro darbą sudaro literatūros apžvalga ir praktinės dalies, apimančios laboratorinį eksperimentą ir kompiuterinį laboratorinio eksperimento modeliavimą. Pirmojoje literatūros apžvalgos dalyje nagrinėjama Latvijos ir Lietuvos pastatų energijos vartojimo efektyvumo politika, pateikiami duomenys apie šių šalių istorinį pastatų fondą, istorinių pastatų energinį efektyvumą ir klimato pokyčių įtaką. Antroje literatūros analizės dalyje nagrinėjama literatūra apie higroterminius procesus išorinėse pastatų sienose, istorinių pastatų išorinių sienų specifines savybes, šiltinimo medžiagas ir vidinės izoliacijos metodus, taip pat apie galimas šilumos izoliacijos taikymo rizikas. Kompiuterinio modeliavimo priemonėmis nagrinėjama šilumos, oro ir drėgmės pernaša. Praktinėje darbo dalyje pateiktas laboratorinis eksperimentas, kurio metu buvo išbandytos 8 šilumos izoliacinės medžiagos. Eksperimentas buvo modeliuojamas DELPHIN programa. Eksperimento rezultatai rodo, kad kompiuterinio modeliavimo rezultatai neprognozuoja tikslaus konstrukcijų higroterminio elgesio, kuris buvo stebimas eksperimente. Darbą sudaro 93 puslapiai, jame yra 52 paveikslai, 17 lentelių ir 5 lygtys. Darbe pateikta 72 literatūros šaltinių. Šis tyrimas buvo finansuojamas Latvijos Respublikos Ekonomikos Ministerijos pagal projektą „Pastatų energinio efektyvumo technologijų tobulinimas” (I-BEET), projekto Nr. VPP-EM-EE-2018 / 1-0003.
 Raktiniai žodžiai: Šilumos izoliacinių, istoriniuose pastatuose, medžiagų pritaikyma
 The author of this Master Thesis is student at Riga Technical University in the program of Environmental Science, Viesturs Balodis. The title of this thesis is “Internal application of thermal insulation materials in historic buildings”. The aim of this thesis is to perform simulations and testing of hygrothermal processes in laboratory setting for a brick masonry wall with internal insulation insulated with various insulation materials with variable outdoor conditions and introduction of wind-driven rain and sun events on the cold side of the construction. The Master Thesis consists of literature review and practical work, which includes laboratory experiment and computer simulations of the laboratory experiment. The first part of the literature review examines energy efficiency policies of building sector in Latvia and Lithuania, available data on historic building stock in these countries, energy efficiency of historic buildings and the overall influence of building sector on climate change. The second part of the literature analysis examines literature about hygrothermal processes in external walls of buildings, specific properties of external walls of historic buildings, commercially available insulation materials and approaches of internal insulation, as well as possible risks of internal application of thermal insulation and available computer simulation tools for coupled heat, air and moisture transport. In practical part of the thesis a laboratory experiment was carried out, in which 8 thermal insulation materials were tested. The experiment was simulated in DELPHIN software. The results of the experiment indicate that the results of computer simulations do not precisely predict the hygrothermal behaviour of the construction, which was observed in the experiment. The Thesis consists of 94 pages, it has 53 figures, 17 tables and 5 equations. This thesis has 72 references. This research is funded by the Ministry of Economics of the Republic of Latvia, project “Improvement of building energy efficiency technologies (I-BEET)”, project No. VPP-EM-EE-2018/1-000
 Raktiniai žodžiai: Thermal insulation, internal application, interior application, interior insulation, internal insulation, historic builings
 Ligita Bikelytė
 Vilniaus miesto gatvių sąšlavų tyrimas ir vertinimas
 Baigiamajame magistro darbe nagrinėjamos gatvių sąšlavos, jų sudėtis, jose aptinkami teršalai ir poveikis aplinkai. Tikslas – nustatyti susidarančių Antakalnio ir Žirmūnų gatvių sąšlavų sunkiųjų metalų koncentracijas ir chloridų kiekį bei įvertinti jų galimą poveikį aplinkai. Gatvių sąšlavų mėginiai rinkti 2019 ir 2020 metais kovo mėnesio pradžioje. Mėginių ėmimo vietos ir gauti rezultatai pateikiami ArcMap 10.7 programa. Sunkiųjų metalų (Cu, Cr, Pb ir Zn) nustatymui naudojamas rentgeno fluorescencinis spektrometras Niton XL2 ir chloridų kiekio nustatymui naudojama LAND 63-2004 esanti metodika. Pateikiami ir aptariami tyrimų duomenys ir vertinamas gatvių sąšlavose esančių sunkiųjų metalų suminis užterštumas (Zd), geoakumuliacijos indeksas (Igeo) ir taršos pakrovos indeksas (PLI). Rezultatai parodė, kad Antakalnio ir Žirmūnų gatvių dalys, tokios kaip sankryžos, reguliuojamos ir nereguliuojamos perėjos yra labiausiai užterštos. Didžiausią įtaką sunkiųjų metalų koncentracijai gatvių sąšlavose daro transporto intensyvumas, transporto dalių dėvėjimasis, vairavimo elgsena, meteorologinės sąlygos, gatvių išsidėstymas ir t. t. Chloridų kiekį gatvių sąšlavose nulemia šie pagrindiniai veiksniai: transporto intensyvumas, meteorologinės sąlygos, druskų barstymo metodas ir plotas.
 Raktiniai žodžiai: sąšlavos, sunkieji metalai, chloridai, koncentracija, rentgeno fluorescencinė spektrometrija, užterštumas
 The final master's thesis examines street sweepings, their composition, pollutants and their environmental impact. The aim is to determine the concentrations of heavy metals and the amount of chlorides in the formed Antakalnis and Žirmūnai streets and to assess their potential impact on the environment. Samples of street sweepings were collected in 2019 and 2020 early March. Sampling locations and results are presented in ArcMap 10.7. The X-ray fluorescence spectrometer Niton XL2 is used for the determination of heavy metals (Cu, Cr, Pb and Zn) and the methodology of LAND 63-2004 is used for the determination of chloride content. The research data are presented and the total pollution (Zd), geoaccumulation index (Igeo) and pollution load index (PLI) of heavy metals in street sweepings are evaluated. The results showed that parts of Antakalnis and Žirmūnai streets, such as intersections, regulated and unregulated crossings, are the most polluted. The concentration of heavy metals in street sweepings is mainly influenced by traffic intensity, wear of transport parts, driving behavior, meteorological conditions, street layout, etc. The amount of chloride in street sweepings is determined by the following main factors: traffic intensity, meteorological conditions, method and area of salt spreading.
 Raktiniai žodžiai: sweepings, heavy metals, chlorides, concentration, X-ray fluorescence spectrometry, pollution.
 Elina Racko
 Labyrinthulomycetes klasės mikroorganizmų padermių ir taikomų žemės ūkio pramonės šalutinių produktų daugiakriterinė analizė
 Magistro baigiamąjį darbą „Labyrinthulomycetes klasės mikroorganizmų padermių ir taikomų žemės ūkio pramonės šalutinių produktų daugiakriterinė analizė“ parašė Rygos technikos universiteto Elektros ir aplinkos inžinerijos fakulteto aplinkos mokslų programos antro kurso studentė Elīna Račko. Šio magistrinio darbo tikslas yra atlikti daugiakriterinę analizę, naudojant TOPSIS metodiką, siekiant nustatyti, ar biologiškai skaidžios atliekos gali būti tinkamiausios vienaląsčio aliejaus gamybai Lietuvoje ir Latvijoje. Darbą sudaro literatūros apžvalga ir praktinė dalis – daugiakriterinė analizė. Literatūros apžvalgoje aptariamos tokios temos kaip: maistinių medžiagų trūkumas akvakultūroje ir galimas vienaląsčių aliejų naudojimas žuvų maiste. Autorė analizuoja, ar biologiškai skaidūs atliekų produktai iš Latvijos ir Lietuvos yra tinkami vienaląsčiams aliejams gaminti. Be to, į literatūros apžvalgą įtraukta ir kitų šalių patirtis gaminant vienaląsčius aliejus iš Labyrinthulomycetes klasės mikrobiologinių kultūrų. Daugiakriterinę analizę sudaro tokių biologiškai skaidžių atliekų produktų kaip neapdoroto glicerolio (gaunamo iš biodyzelino gamybos), žemos kokybės medienos, pieno atliekų, alaus daryklos šalutinių produktų – panaudotų grūdų ir mielių, obuolių atliekų iš sulčių gamybos ir melasos iš cukraus gamybos įvertinimas. Šiame darbe, norint pasirinkti geriausią alternatyvą, nustatomi šie kriterijai: vietinis prieinamumas, žaliavos kaina, būtinas išankstinis apdorojimas, dokozaheksaeno rūgšties išeiga ir agrarinės pramonės šalutinių produktų galiojimo laikas. Buvo pateikti pasiūlymai išryšinant būsimų tyrimų kryptis. Darbą sudaro 77 puslapiai, kuriuose yra 23 paveikslai, 8 formulės ir 20 lentelių. Pabaigoje yra 1 priedas. Autorė išanalizavo 119 literatūros šaltinius. Darbas parašytas anglų kalba
 Raktiniai žodžiai: Labyrinthulomycetes, vienaląsčių aliejus , biologiškai skaidūs šalutiniai produktai Latvijoje ir Lietuvoje, TOPSIS
 The Master thesis “Multicriteria analysis of Labyrinthulomycetes class microorganism strains and applicable agro-industrial by-products” is written by Elīna Račko, a second-year student of the Faculty of Electrical and Environmental Engineering – Environmental science programme in Riga Technical university. The aim of this Master thesis is to perform a multicriteria analysis using TOPSIS methodology, to determine, witch of the biodegradable waste-products would be the most suitable for single cell oil production in Lithuania and Latvia. The thesis consists of a literature review and practical part – multi-criteria analyses. The literature review covers topics such as – lack of nutrients in aquacultures and the potential use of single cell oil in fish food. The author analysis if the biodegradable waste products from Latvia and Lithuania are suitable for producing a single cell oil. In addition, other country experiences with producing single cell oil from microbiological cultures of the order Labyrinthulomycetes class are also included in the literature review. Multicriteria desertion making analysis consists of evaluation of such biodegradable waste products as crude glycerol (from biodiesel production), low quality wood, dairy waste, brewery by-products – spent grain and yeast, apple waste from juice production and molasses from sugar production. In this work, in order to choose the best alternative, the following criteria are set: local availability, price of feedstock, required pre-treatment, docosahexaenoic acid yield and expiration date of agro-industrial by-products. Suggestions have been made to highlight the path for future research. The thesis consists of 77 pages, that contain 23 pictures, 8 formulas and 20 tables. There are 1 attachment at the end. The author analysed 119 literature sources. The thesis is written in English.
 Raktiniai žodžiai: Labyrinthulomycetes, single cell oil, biodegradable waste-products in Latvia and Lithuania, TOPSIS
 Atsinaujinančių energijos išteklių gamybos įmonėse naudojimo skatinimas
 dr. Vaida Šerevičienė
 Magistro baigiamasis darbas pavadinimu „Atsinaujinančių energijos išteklių gamybos įmonėse naudojimo skatinimas“ atliko studentas Edgaro Kudurs Vilniaus Gedimino technikos universiteto Aplinkos inžinerijos fakulteto Aplinkos apsaugos ir vandens inžinerijos katedroje ir Rygos Technikos universiteto, Elektronikos ir Aplinkos inžinerijos fakultete, Energetikos sistemų ir aplinkos institute dvigubo diplomo studijų programoje “Aplinkos apsaugos technologijos ir vadyba”. Šio magistro baigiamojo tikslas sukurti atsinaujinančių energijos šaltinių technologijų įvertinimo metodiką, atsižvelgiant į tvarumo aspektus, kurie galėtų suteikti papildomos informacijos ir pagerinti sprendimų priėmimo procesą, taip pat parengti įgyvendinimo politikos rekomendacijas, skatinančias atsinaujinančių energijos išteklių technologijų panaudojimą gamybos įmonėse. Siekiant šio tikslo, vykdomos šios užduotys: prieinamos literatūros ir įstatyminių dokumentų analizė, įmonių apklausos atlikimas, strateginių rekomendacijų rengimas ir prioritetų nustatymas bei metodikos, kurioje atsižvelgiama į socialinę ir ekonominę, aplinkosaugos ir klimato kaitos aspektus vertinant atsinaujinančios energijos technologijas. Vertinimui atlikti, iš literatūros analizės parenkami atsinaujinančios energijos technologijos, bei tinkami vertinimo kriterijai ir juos apibūdinantys duomenys. Magistro darbą sudaro 3 skyriai. Pirmasis skyrius yra literatūros analizė, kurią sudaro trys poskyriai. Antrajame skyriuje pateikta metodika, jį sudaro trys poskyriai. Trečiame poskyryje aprašoma įgyvendinimo politikos rekomendacijų rengimo ir prioritetų nustatymo tvarka. Trečiajame skyriuje pateikiami darbo rezultatai, jį taip pat sudaro keturi poskyriai. Magistro darbą sudaro 95 puslapiai, jame yra 42 paveikslai ir 21 lentelių. Darbe naudojami 116 literatūros šaltiniai, iš kurių 94 - anglų kalba. Prie baigiamojo darbo pridedami du priedai.
 Raktiniai žodžiai: Atsinaujinančių energijos išteklių gamybos įmonėse naudojimo skatinimas
 The Master’s Thesis titled “Promotion of the use of renewable energy resources in the manufacturing enterprises” is developed by Edgards Kudurs in Vilnius Gediminas Technical University, Faculty of environmental engineering, Department of environmental protection and water engineering and Riga Technical University, Faculty of Electrical and Environmental Engineering, Institute of Energy Systems and Environment within the double degree program “Environmental science”. The Master’s Thesis aims to develop a methodology for the evaluation of renewable energy resource technologies, taking into account sustainability aspects, which could provide additional information and improve the decision-making process, as well as to develop policy recommendations to promote and incentivize the introduction of RES technologies in manufacturing enterprises. In order to achieve this aim, the following tasks are performed: a review of available literature and legislative documents, conducting of an enterprise survey, development and prioritization of policy recommendations and the development of a methodology which takes into account the socio-economic, environment and climate change aspects for renewable energy technology evaluation. For the evaluation itself, renewable energy technologies to be evaluated are selected, as well as appropriate evaluation criteria, and the data characterizing them from the available literature. There are three chapters in the Master’s Thesis. The first of the chapters is a review of the literature, which contains three main sub-chapters. The second chapter describes the methodology and is divided into three sub-chapters. The third chapter contains the results of the work and is divided into four sub-chapters. The Master’s Thesis consists of 95 pages; it includes 42 figures and 21 tables. 116 literature sources are used in the work, of which 94 – in English. Two appendices are attached to the Master’s Thesis.
 Raktiniai žodžiai: Promotion of the use of renewable energy resources in the manufacturing enterprises
 Roberts Kakis
 „Nuo idėjos iki produkto“ platforma išradėjams
 Ateinantį dešimtmetį ES valstybės narės daug dėmesio skirs tvariam, ekologiškam ir naujoviškam valdymui. Šiuo metu Latvijoje ir Lietuvoje nėra pilno sutarimo šiais aspektais ir daugeliu atvejų mokslo ir verslo bendradarbiavimas yra komplikuotas. Tiek Latvijoje, tiek Lietuvoje yra stiprių mokslo institucijų ir pripažintų verslo atstovų bei gamintojų, jų bendradarbiavimas paspartintų augimą ir konkurencingumą tarptautiniu lygiu. Pagrindinis šio darbo tikslas yra sukurti platformą išradėjams, kuri leistų jiems suprasti, kokių veiksmų jie turėtų imtis patys, kad sukurtų tvarias ir ekologiškas naujoves, o taip pat kokiū būdu galėtų bendradarbiauti. Darbe pateikiami pavyzdžiai ir paaiškinimas, kas yra patentas, koks jo vaidmuo inovacijų gyvavimo cikle ir kokią naudą jis suteikia, bei naujo inovatyvaus įrenginio – „dulkių degiklio“ gyvavimo ciklo analizės pavyzdys. Pateikti skirtingi naudojimo būdai ir pagrįsta, kuris iš jų šiuo metu būtų tinkamiausias. Atliekant gyvavimo ciklo analizę buvo įvertinti trys scenarijai ir prieita išvados, kad sąlyginai ekologiškas scenarijus nesudaro žymaus poveikio aplinkai, be to žaliavų naudojimas kituose sektoriuose būtų labiau racionalus.
 Raktiniai žodžiai: dulkių degiklis, poveikis aplinkai, inovacijos, gyvavimo ciklo vertinimas, išradėjų platforma, tvarumas.
 In the next decade, EU Member States will focus on sustainable, environmentally friendly and innovative governance. There is currently no unity in these aspects in Latvia and Lithuania and, in most cases, cooperation between science and business is a problem. Both Latvia and Lithuania have strong scientific institutions and recognised entrepreneurs and producers, the merger would lead to rapid growth and competitiveness at international level. The main aim of this work is to create a platform for inventors that would allow them to understand what they should do on their own to create sustainable and environmentally friendly innovations and cooperations. The work provides examples and an explanation of what is a patent, what its role is in the innovation life cycle and what benefits it gives, and an example of life-cycle analysis for a new innovative device called “Dust burner”, with a view to clarifying what type of use would be the most appropriate at the moment. Three scenarios have been assessed in the life cycle analysis, which concludes that the supposedly environmentally friendly scenario does not have the least impact on the environment and that the use of raw materials in another sector would be more rational.
 Raktiniai žodžiai: dust burner, impact to environment, innovation, life cycle assessment, platform for inventors, sustainability.
 Žuvies perdirbimo efektyvumo daugiakriteris vertinimas
 Šis darbas skirtas žuvies gamybos pramonei, kuri yra svarbi maisto gamybos pramonės dalis. Dėl augančios žuvies produktų paklausos pramonė yra griežtai reguliuojama ir stebima įvairių įstatymų leidybos institucijų, regionų ir Europos Sąjungos. Šios institucijos nustato aplinkos apsaugos įstatymus, leidžiančius kontroliuoti ir gerinti pramonės poveikį (energijos efektyvumas, tarša, atliekos) buveinėms ir aplinkai. Kad ES priimtų teisingus sprendimus, kaip valstybės narės galėtų plėtoti savo žuvies auginimo pramonę, būtina turėti bendrą vertinimą, į kurį būtų įtrauktos plėtros galimybės. Toks planas yra parengtas ES siekiant iki 2050 m. Pasiekti anglies neutralumą. „Green Deal“ ir ES bioekonomikos strategija yra sukurti siekiant valdyti išteklius (žuvų išteklius, žuvų auginimą, rinką, technologijas, švarią energiją ir atliekas), efektyviai juos valdyti ir naudoti išteklius. tvariu būdu. Žuvų auginimo įmonės efektyvumas apibūdina naudojamų išteklių kiekį, taip pat energijos efektyvumą, vandens sunaudojimą, galimybę įgyvendinti žiedinę ekonomiką ir kitus kriterijus, kurie turi būti įvertinti atsižvelgiant į aplinkosaugos, inžinerijos, ekonominius ir socialinius aspektus. . Šis darbas įvertina ES nustatytą ir valdomą žuvų produktų tvarkymo ir energijos vartojimo efektyvumo didinimo priemonių teisinį reguliavimą. Išnagrinėtos ir įvertintos konservuotų žuvų sterilizavimo technologijos (autoklavai), kad būtų galima suprasti ir įvertinti bendrą situaciją apie esamus iššūkius, su kuriais žuvų gamintojai gali susidurti, norėdami pagerinti autoklavų efektyvumą. Įvertinami žuvies produktų gamybos etapai, siekiant įvertinti jų poveikį klimato pokyčiams. Žuvininkystės ir žuvies produktų gamybos įmonės išmetami teršalai įvertinami siekiant išsiaiškinti, kiek šis sektorius įsipareigoja iš viso ŠESD ES. Šiame darbe analizuojama žuvų auginimo įmonės technologijos (autoklavas) analizė, naudojant duomenų apvalkalo analizės (DEA) daugiakriterinę analizę. Įvertinti įvairūs autoklavai, tinkami žuvies konservų gamybai, ir rezultatai rodo, kad kai kurie autoklavai yra efektyv
 Raktiniai žodžiai: duomenų apvalkalo analizės
 This thesis is devoted to fish production industry, which is as an important part of food production industry. Due to the growing demand of fish products the industry is being strongly regulated and monitored by various legislative institutions, regional and European Union. These institutions set environmental legislation for controlling and improving industries impact (energy efficiency, pollution, waste) on the habitat and environment. For EU to make right decisions on how the member states could develop their fish production industry, it is necessary to have overall evaluation which includes the development opportunities. Such plan is developed at EU to achieve carbon neutrality by 2050. The Green Deal and EU Bioeconomy strategy are developed to control the resources (fish stock, fish production, market, technologies, clean energy and waste), manage them efficiently and use resources in a sustainable manner. The efficiency of the fish production company characterizes the amount of resources used, as well as energy efficiency, water usage, the possibility to implement of circular economy, and other criteria which must be evaluated from the perspective if environmental, engineering, economic and social aspects. This thesis evaluates the legislative regulation set and managed by the EU for fish product management and energy efficiency measures. The technologies (autoclaves) for canned fish sterilization are examined and evaluated to be able to understand and evaluate to the general situation about existing challenges which fish producers might have to face for improving the autoclave efficiency. The fish product production stages are evaluated to assess their impact on the climate change. Fisheries and fish product production company produced emissions are evaluated to see how much the sector is committing to total GHG in EU. The fish production company technology (autoclave) analysis in this work are analyzed using Data envelopment analysis (DEA) multicriteria analysis. Various autoclaves suitable for canned fish production are evaluated and the results show th
 Raktiniai žodžiai: Data envelopment analysis
 Ketija Bumbiere
 Biodujų sistemų taikymo sprendimų priėmimo analizė
 Kadangi Latvijoje šiuo metu aktyviai diskutuojama, kad subsidijos bus skiriamos tik biodujų gamintojams, kurie biodujas gamins tik iš mėšlo, šio darbo naujovė ir pagrindinis tikslas yra atlikti daugiakriterinę analizę, naudojant TOPSIS metodiką, kad būtų galima objektyviai nustatyti , kuris iš laikomų substratų būtų tinkamiausias biodujų gamybai tiek Latvijoje, tiek Lietuvoje, atsižvelgiant į 3 kriterijus: ekonominį pagrįstumą, substrato efektyvumą ir ekologiškumą. Buvo svarstomi 8 substratai: galvijų mėšlas, kiaulių mėšlas, paukščių mėšlas, šiaudai, mediena, kukurūzų silosas, atliekos ir nuotekų dumblas. Šis tyrimas rodo rezultatus su optimaliomis žaliavomis, kurios taip pat puikiai pakeistų biodujų kukurūzus. Norint pasiekti tikslą, į darbą įtraukta literatūra ir statistinė analizė, įvairūs interviu, atlikti skaičiavimai. Darbe išskiriamas puikus iki šiol naudojamo substrato, naudojamo biodujų gamyboje, pakaitalas, kurio politika keičiasi ir daugiau nebus finansiškai remiama. Gaunant substrato vertinimą, analizuojamas vienas iš Latvijoje biodujų gamybai naudojamų substratų - kukurūzai, kuris reitinge yra vienas iš paskutinių, ir substratas, kuris užima pirmą vietą kaip geriausias biodujų gamybos substratas Latvijoje - kiaulių mėšlas. Kai abu šie substratai naudojami biodujų gamybai, jų tikrasis poveikis aplinkai nustatomas sudarant anglies balansą. Taigi gaunami įrodymai apie biodujų jėgainių plėtros svarbą, taip papasikeitė kryptis renkantis substratus.
 Raktiniai žodžiai: Substrato pasirinkimas, biogazė, TOPSIS modelis, anglies balansas.
 As there is currently an active discussion in Latvia that subsidies will be granted only to biogas producers, who will produce biogas only from manure, the novelty and the main aim of this work is to perform a multi-criteria analysis using TOPSIS methodology to objectively determine, which of the substrates considered would be the most suitable for biogas production both in Latvia and Lithuania, taking into account 3 criteria: economic feasibility, substrate efficiency and environmental friendliness. 8 substrates were considered: cattle manure, swine manure, poultry manure, straw, wood, maize silage, waste and sewage sludge. This research shows results the optimal feedstocks, which would also be a great substitute for biogas maize. In order to achieve the goal, the work includes literature and statistical analysis, various interviews, calculations made. The work identifies an excellent substitute for the substrate used in biogas production, which has been used so far and for which the policy is changing and will no longer be financially supported at all. In obtaining the substrate rating, both one of the substrates used in Latvia for biogas production – maize, is analyzed, which ranks as one of the last in the ranking, and the substrate that ranks first as the best substrate for biogas production in Latvia – pig manure. For the use of both of these substrates for biogas production, their real impact on the environment is determined by establishing a carbon balance sheets. Thus obtaining evidence of the importance of the development of biogas plants, as well as a change of direction in the choice of substrates.
 Raktiniai žodžiai: Substrate choice, biogas, TOPSIS model, carbon balance.
 Robert Ružickij
 Naudotų padangų tekstilės pluošto atliekų akustinių ir šiluminių savybių tyrimas ir vertinimas
 Baigiamajame magistro darbe buvo išanalizuotos padangų tekstilės pluošto atliekų panaudojimo galimybės akustinėje ir šiluminėje izoliacijoje. Darbo tikslas – įvertinti ir išanalizuoti perdirbtų padangų tekstilės pluošto atliekų savybes akustinėje ir šiluminėje izoliacijoje, taikant žiedinės ekonomikos principus. Pirmajame darbo skyriuje buvo atlikta pastatų akustikos, medžiagų garso sugerties ir šilumos izoliacijos savybių, jų klasifikavimo, triukšmo ir padangų atliekų poveikio aplinkai bei padangų perdirbimo technologijų analizė. Antrajame skyriuje aprašyta taikyti metodai, naudojama įranga bei medžiagos. Trečiajame skyriuje buvo pristatyti ir išanalizuoti eksperimentinio tyrimo rezultatai. Ketvirtajame skyriuje buvo pristatyti modeliavimo rezultatai ir palyginti su eksperimentinių tyrimų rezultatais. Pabaigoje buvo pateiktos išvados, rekomendacijos, literatūros sąrašas ir autoriaus publikacijos bei pristatymai. Baigiamasis darbas sudarytas iš 10 pagrindinių dalių: įvado, literatūros apžvalgos, metodologijos, tyrimų rezultatų analizės, modeliavimo rezultatų analizės, išvadų, rekomendacijų, literatūros sąrašo, autoriaus publikacijų ir autoriaus pristatymų. Darbą sudaro: 88 puslapiai be priedų, 56 paveikslai, 16 lentelių, 100 literatūros šaltinių.
 Raktiniai žodžiai: Medžiagos garso absorbcijos koeficientas; medžiagos šiluminis laidumas; perdirbtų padangų tekstilės pluošto atliekos; reverberacijos laiko mažinimas.
 In the Master thesis recycled tyres textile fibre waste application possibility was analysed for acoustical and thermal insulation. Aim of the thesis is to evaluate and analyse recycled tyre textile fibre waste performance in acoustical and thermal insulation, as an application of Circular Economy Principles. In the first chapter of the thesis literature review analysis was conducted on solutions for buildings acoustics, materials sound absorption and thermal insulation properties, their classification, noise and tyres waste impact on environment, and tyres waste recycling technology. In the second chapter the methods, used equipment, materials were described. In the third chapter the results of the experimental research were presented and analysed. In the fourth chapter the modelling results were presented and compared to experimental research. In the end conclusions, references and authors publications were presented. Thesis consists of 10 main parts: introduction, literature review, methodological part, analysis of the results, analysis of the modelling results, conclusions, recommendations, references, list of author’s publications, and list of author’s presentations. Thesis volume: 88 pages without appendices, 56 figures, 16 tables, 100 references.
 Raktiniai žodžiai: Materials sound absorption coefficient; materials thermal conductivity; recycled tyres textile fibre waste; reverberation time reduction.
 Rima Dervinytė
 Kiaušinių lukštų taikymas švinui iš užteršto vandens šalinti
 Magistro darbe išanalizuotos kiaušinių lukštų atliekų panaudojimo galimybės švino jonų adsorbcijai iš užteršto vandens. Darbo tikslas - atlikti tyrimus ir jų vertinimą naudojant organines atliekas (kiaušinių lukštus) kaip adsorbentus sunkiesiems metalams pašalinti iš vandeninių tirpalų. Pirmame skyriuje analizuojami sunkiųjų metalų šaltiniai, jų poveikis aplinkai ir galimi jų pašalinimo iš vandeninių tirpalų metodai. Antrame skyriuje atliekama daugiakriterinė sprendimų analizė, lyginant tokius metodus kaip atvirkštinė osmozė, nanofiltracija, adsorbcija, jonų mainai ir elektrodializė. Trečiajame skyriuje pateiktas adsorbcijos parametrų eksperimentų paruošimas ir metodika. Ketvirtame skyriuje gauti adsorbcijos parametrų eksperimentiniai rezultatai yra statistiškai apdoroti ir rezultatai pavaizduoti grafiškai. Pabaigoje pateikiamos išvados ir rekomendacijos, taip pat autoriaus publikacijos ir prezentacijos bei priedai. Darbą sudaro 9 pagrindinės dalys: įvadas, literatūros apžvalga, daugiakriterinė sprendimų analizės dalis, metodinė dalis, rezultatų analizė, išvados, rekomendacijos, literatūros sąrašas ir priedai. Darbo apimtis - 72 p. teksto be priedų, 34 paveikslai, 21 lentelė, 78 bibliografiniai šaltiniai.
 Raktiniai žodžiai: Adsorbcija; adsorbcijos izotermos; sunkieji metalai; mažos kainos adsorbentas.
 In the Master thesis egg shell waste application opportunities were analyzed for lead ion adsorption from contaminated water. Aim of the thesis is to perform complex research and evaluation using organic waste (egg shells) as adsorbents to remove heavy metals from aqueous solutions. In the first chapter literature analysis for heavy metal sources, their effect to environment and possible methods for removing them from aqueous solutions is performed. In the second chapter multi–criteria decision analysis comparing methods like reverse osmosis, nanofiltration, adsorption, ion exchange and electrodyalisis is executed. In the third chapter preparation and methodology for adsorption parameter experiments is presented. In the fourth chapter the results for adsorption parameter experiments obtained are statistically processed and plotted graphically. At the end, the conclusions and recommendations as well as the author's publications are presented in the appendices. Thesis consists of 9 main parts: introduction, literature review, multi-criteria decision analysis part, methodological part, analysis of the results, conclusions, recommendations, references and appendices. Thesis volume: 72 pages without references and appendices, 34 figures, 21 tables, 78 references.
 Raktiniai žodžiai: Adsorption; adsorption isotherm; heavy metals; low cost adsorbent.
 Aukštųjų Panerių rajono (Vilniaus m.) vandentiekio sistemos hidraulinis modeliavimas ir optimizavimas
 Hidraulinis modelis yra modernus įrankis, taikomas vandentiekio sistemos darbo analizei visame pasaulyje. Pasitelkiant hidraulinį modeliavimą, galima analizuoti įvairius scenarijus vandentiekio tinkle, kad būtų galima parinkti tinkamus inžinerinius sprendimus sistemai optimizuoti. Šiame darbe nagrinėta didžiausio Vilniaus pramoninio rajono – Aukštųjų Panerių raj. – vandentiekio sistema. Tyrimo metu buvo atlikti natūriniai debito ir slėgio matavimai bei sudarytas mikrorajono vandentiekio tinklo hidraulinis modelis, padarytas jo kalibravimas pasiekiant ne didesnę nei 9,8 % paklaidą pagal debitą ir 0,06 bar pagal slėgį. Buvo nustatyta, kad Aukštųjų Panerių raj. vandentiekio tinkle vandens nuostoliai sudaro 8 %. Nustatyta, kad slėgis vandentiekio tinkle yra pasiskirstęs nuo 2,0 iki 7,5 bar. Pateikti slėgio vandentiekio tinkle mažinimo būdai. Atlikta antrojo kėlimo siurblių analizė bei jų suvartojamos elektros energijos vertinimas. Nustatyta, kad vandens išbuvimo trukmė tinkle siekia daugiau nei 96 valandas. Taip pat atlikta vandentiekio sistemos darbo analizė kilus gaisrui ir avarijai vandentiekio tinkle. Pateikiamos rekomendacijos, kokias priemones pasitelkiant būtų galima optimizuoti Aukštųjų Panerių raj. vandentiekio sistemos darbą. Darbą sudaro 6 dalys: įvadas, literatūros apžvalga, tyrimų metodika, rezultatų analizė, išvados ir literatūros sąrašas. Darbo apimtis: 80 psl. tekstinės dalies, 59 iliustracijos, 7 lentelės, 44 literatūros šaltiniai.
 Raktiniai žodžiai: debito matavimai, hidraulinis modelis, hidraulinio modelio kalibravimas, vandentiekis, vandentiekio sistemos darbo optimizavimas
 The hydraulic model is a modern tool used to analyse the operation of a water distribution system in all over the world. Hydraulic modelling can be used to analyse a variety of scenarios within a water distribution network to identify appropriate engineering solutions to optimize the system. This work deals with the water distribution system of the largest industrial district in Vilnius city – Aukstieji Paneriai. During the research, flow and pressure measurements were made and a hydraulic model of the water distribution network was created, which was calibrated by achieving a maximum error of 9,8 % in flow and 0,06 bar in pressure. It was estimated that the water loss in Aukstieji Paneriai water distribution network amounts to 8 %. It was found that pressure in the water distribution network is distributed from 2,0 to 7,5 bar. Methods for reducing pressure in the water supply network are presented. Water age in the network was found to be more than 96 hours. An analysis of the water distribution system operation in case of fire and an accident in the network was also performed. Recommendations are provided on what measures could be used to optimize Aukstieji Paneriai district water distribution system operation. Work consists of 6 parts: introduction, literature review, research methodology, analysis of results, conclusions and references. Extent of work: 80 p. text, 59 pictures, 7 tables, 44 references.
 Raktiniai žodžiai: flow measurements, hydraulic model, hydraulic model calibration, water supply, optimization of water distribution system
 Antropogeninės taršos įtakos Nevėžio upės hidrochemijai tyrimas ir vertinimas
 prof. dr. Valentinas Šaulys
 Darbe analizuojamos Nevėžio upės dviejų paskutinių dešimtmečių (1998–2018 m.) nitratų azoto (NO3-N) ir fosfatų fosforo (PO4-P) koncentracijos. Upės vandens kokybės hidrocheminiam vertinimui naudojami iš Aplinkos apsaugos agentūros gauti 1998–2018 m. laikotarpio nitratų ir fosfatų koncentracijų mėnesiniai duomenys (aukščiau ir žemiau Panevėžio bei Kėdainių ir aukščiau Raudondvario) ir atitinkami vandens debitai. Statistinės analizės metodais, esant 95 % patikimumui buvo pagrįstos nitratų ir fosfatų koncentracijų kaitos tendencijos. Taip pat 2019 m. buvo atliekami natūriniai nitratų azoto ir fosfatų fosforo koncentracijų tyrimai Nevėžio upėje. Upės natūrinių tyrimų rezultatai buvo vertinami pagal fizikinius-cheminius kokybės elementus – nitratų azotą ir fosfatų fosforą. Vidutinė nitratinio azoto koncentracijų reikšmė 1998–2008 m. laikotarpiu aukščiau Raudondvario buvo 3,54 mg/l, o 2008–2018 m. laikotarpiu – 3,77 mg/l. Vidutinė fosfatų fosforo koncentracijų reikšmė 1998–2008 m. laikotarpiu aukščiau Raudondvario buvo 0,220 mg/l, o 2008–2018 m. laikotarpiu – 0,091 mg/l. Darbą sudaro 6 dalys: įvadas, literatūros apžvalga, tyrimų metodika, rezultatai ir jų aptarimas, išvados bei literatūros sąrašas. Darbo apimtis: 50 p. tekstinės dalies, 16 paveikslėlių, 11 lentelių, 42 literatūros šaltiniai.
 Raktiniai žodžiai: debitas, fosfatų fosforas, koncentracija, nitratų azotas, vandens kokybė.
 This thesis analyzes nitrate nitrogen (NO3-N) and phosphate phosphorus (PO4-P) concentrations in the last two decades (1998–2018) of the Nevezis River. The hydrochemical assessment of river water quality is used for the 1998-2018 period from the Environmental Protection Agency. Monthly data on nitrate and phosphate concentrations over the period (above and below Panevezys and Kedainiai and above Raudondvaris) and corresponding water flows. Statistical analysis methods with 95% confidence were used to validate trends in nitrate and phosphate concentrations. Also in 2019 natural investigations of nitrate nitrogen and phosphate phosphorus concentrations in the Nevezis River were carried out. The results of in-kind studies of the river were evaluated on the basis of physico-chemical quality elements - nitrate nitrogen and phosphate phosphorus. The average value of nitrate nitrogen concentrations over the period 1998-2008 was 3.54 mg / l above Raudondvaris and 3.77 mg / l during the period 2008-2018. The average value of phosphate phosphorus concentrations above Raudondvaris was 0.220 mg / l in the period 1998–2008, and 0.091 mg / l during the period 2008–2018. Structure of final work: 50 p. text, 16 pictures, 11 tables, 42 literature entries.
 Raktiniai žodžiai: flow rate, phosphate phosphorus, concentration, nitrate nitrogen, water quality.
 Andrej Naimušin
 Triukšmo slopinimo sienelių, pagamintų iš padangų gumos granulių, efektyvumo tyrimas ir vertinimas
 Baigiamajame magistriniame darbe buvo ištirta triukšmo slopinimo sienelė pagaminta iš gumos granuliato ir perforuotos plastiko plokštės. Triukšmo slopinimo sienelės fragmentas buvo ištirtas taikant įneštinio garso, ineštinio garso silpninimo, garso izoliacijos bei absorbcijos nustatymo metodikas. Triukšmo slopinimo sienelės konfigūracijos sėkmingai panaudotos problematiškoje vietoje (Oslo g. atkarpa) taikant skaitinio modeliavimo programas. Darbą sudaro šios dalys: įvadas, bendros žinios apie garsą ir triukšmą, gumos granuliato panaudojimo pasaulyje bei mokslinių straipsnių apžvalgą, skaitinio modeliavimo programų apžvalgą, triukšmo slopinimo sienelių standartizavimo aprašymas, tyrimų metodikų ir rezultatų analizė, skaitinio modeliavimo rezultatų analizė, literatūros ir šaltinių sąrašas. Darbo apimtis – 84 puslapiai be priedų, 45 iliustracijos ir 8 lentelių.
 Raktiniai žodžiai: Triukšmas, akustika, gumos granuliatas, triukšmo slopinimo sienelė, skaitinis modeliavimas, perforuotos plastiko plokštės
 In the final master's thesis the sound-absorbing barrier made of rubber granulate and perforated plastic plate was investigated. The fragment of the noise reduction barrier was investigated using the methods of determination of input sound, inertial sound attenuation, sound insulation and absorption. Noise reduction barrier configurations have been successfully used in a problematic area (Oslo Street section) using numerical modeling programs. The work consists of the following parts: introduction, general knowledge about sound and noise, world use of rubber granulate and review of scientific articles, review of numerical modeling programs, description of noise reduction wall standardization, analysis of research methodologies and results, analysis of numerical modeling results, references. Thesis consists of: 84 pages without appendixes, 45 illustrations and 8 tables.
 Raktiniai žodžiai: Noise, acoustics, rubber granulate, noise reduction wall, numerical modeling, perforated plastic panels
 Aleksandre Kipiani
 Taršos kietosiomis dalelėmis visuomeninių pastatų aplinkos ore tyrimas ir vertinimas
 Darbas turi teorinę ir praktinę reikšmę. Pagrindinis jos tikslas yra nustatyti oro užterštumo lygį ypač prie viešųjų pastatų, ypač prie ligoninių, ir nustatyti tinkamiausius ir praktiškiausius oro taršos problemos sprendimo būdus. Pirmoji darbo dalis yra skirta teoriniam samprotavimui. Pirmame skyriuje aptariama oro taršos svarba, taip pat skirtingi taršos šaltiniai, jų poveikis aplinkai ir žmonių sveikatai, taip pat nagrinėjami skirtingų šalių pavyzdžiai ir patirtis. Kitas skyrius tiesiogiai susijęs su eksperimento atlikimo metodika. Pateikiamas tinkamo eksperimento vietos ir laiko pasirinkimo svarbos aprašymas bei atrankos kriterijai. Kitose darbo dalyse pateiktas išsamus tyrime naudojamos technologijos aprašymas ir specifikacija. Tiksliau, IOT technologija. ADMS modeliavimo sistema taip pat turi didelę reikšmę galutiniams rezultatams. Štai kodėl dokumente plačiai aptariama ir parodoma jo įtaka galutiniam rezultatui. Kita dalis yra rezultatų nustatymas ir įvertinimas bei pagrindinės to priežastys. Ši dalis pagrįsta palyginimo metodu. Be abejo, viena iš svarbiausių darbo dalių yra problemų sprendimo būdų paieška. Pabaigoje pateikiami alternatyvūs ir novatoriški problemų sprendimo būdai.
 Raktiniai žodžiai: Oro tarša, kietosios dalelės, IOT technologija, ADMS modeliavimas
 The thesis has theoretical and practical value. Its main goal is to determine the air pollution level near public buildings in particular, near hospitals and to identify the most advisable and practical ways to solve the air pollution problem. The first part of the paper is devoted to theoretical reasoning. The first chapter discusses the importance of air pollution, as well as the different sources of pollution, their effects on the environment, and human health, and the examples and experiences of different countries are also examined. The next chapter deals directly with the methodology of conducting the experiment. There is a description of the importance of choosing the right place and time for the experiment and also selection criteria. In the next parts of the thesis there is given detailed description and specification of the technology that was used in the research. Specifically, IOT technology. ADMS modeling system has also a significant meaning for the final results. That is why the paper discusses it extensively and shows its impact on the final result. The next part is determining and evaluating outcomes and showing the main reasons for it. This part is based on the comparison method. Of course, one of the most important parts of the thesis is to find ways of problem solving. In conclusion, the thesis suggests alternative and innovative methods of problem resolution.
 Raktiniai žodžiai: Air pollution, particulate matter, IOT technology, ADMS modelling
 Zamira Kazizova
 Komunalinių atliekų deginimo lakiųjų pelenų sudėties vertinimas
 Dėl sparčios urbanizacijos ir didelio ekonomikos augimo komunalinės atliekos tampa rimta problema. Dėl to didžiulis poveikis aplinkai sukelia daug problem, susijusių ne tik su oro, dirvožemio ar vandens tarša, bet ir su žmonių sveikata. Vienas iš būdų tvarkyti komunalines atliekas yra jų deginimas su energijos atgavimu, kuris gali ženkliai sumažinti šių atliekų kiekį. Tačiau atliekų deginimo įmonės veikla yra susijusi su pavojingų atliekų susidarymu, kurių didžiąją dalį sudaro lakieji pelenai, kaip šalutiniai atliekų deginimo produktai. Juose yra yra daug sunkiųjų metalų ir druskų, kurie yra labai toksiški. Lakiųjų pelenų tvarkymas šiandien yra labai aktualus klausimas ir svarbu juos tinkamai utilizuoti. Šiame darbe atliktas komunalinių atliekų deginimo lakiųjų pelenų įvertinimas, atlikti septynių rūšių betono mišinių su skirtingu kiekiu atliekų deginimo lakiųjų pelenų bei silicio dioksido nanokompozitų priedų, eksperimentiniai tyrimai nustatant sunkiųjų metalų išsiplovimą. Siekiant nustatyti geriausią alternatyvą buvo naudota SSGG (stiprybių ir silpnybių, galimybių ir grėsmių)analizė ir atlikta ekspertų apklausa.
 Raktiniai žodžiai: pavojingos atliekos; atliekų tvarkymas; betonas; išplovimas.
 Municipal solid waste has become a serious problem because of rapid urbanization and great economic growth. As a result of these, huge impacts on the environment lead to a lot of problems not only air, soil or water pollution but human health too. One of the solutions to manage MSW problem is incineration with energy recovery that can reduce a large amount of waste in volume. But the activity of incineration plant is associated with the formation of a large amount of hazardous waste, a significant part is fly ash which is by-products of MSW contains a high number of heavy metals and salts which are very toxic. Fly ash is a really topical question today and it is important to find out how to dispose of it properly due to hazardous contents. In this study was performed the municipal solid incineration fly ash evaluation, experimental research of heavy metal composition of seven types of a concrete mixture containing different amounts of MSWI fly ash, silica nanocomposites for the determination of the best alternative and employing a SWOT analysis and Questionnaire with experts.
 Raktiniai žodžiai: hazardous waste; waste management; concrete; leaching.
 Anastasija Piščika
 Darnaus transportavimo biodegalai Latvijoje: būvio ciklo vertinimas aplinkos efektui ir suderinamumui
 doc. dr. Marina Valentukevičienė
 Anastasijos Piščikos magistro baigiamojo darbo pavadinimas yra “Darnaus transportavimo biodegalai Latvijoje: būvio ciklo vertinimas aplinkos efektui ir suderinamumui”. Darbo tikslas yra nustatyti geriausius biodegalus ir jų potencialą Latvijos transporto sektoriuje bei sukurti metodiką tinkamiausio kuro tvariam vystymuisi nustatymui, naudojant aplinkos, technologinius, ekonominius ir socialinius parametrus. Magistro darbą sudaro trys skyriai. Pirmasis skyrius skirtas mokslinės literatūros apie biodegalų rūšis ir gamybos technologijas, taip pat kelioms jų specifinėms savybėms analizuoti ir biokuro reguliavimo sistemos apžvalgai. Antrame skyriuje aprašoma metodika, kurią sudaro keli etapai - ekspertų apklausa, kokybinių ir kiekybinių metodų taikymas, gyvenimo ciklo analizės įvertinimas ir daugiakriterinė analizė. Trečiasis skyrius skirtas rezultatų, gautų pritaikius metodiką, analizei. Darbą sudaro 69 puslapių be priedų ir nuorodų. Pateikti 35 paveikslai, 20 lentelių, 5 formulės, 101 literatūros šaltinis. Darbo pabaigoje pridedami 1 priedai.
 Raktiniai žodžiai: Biodegalai, Gyvavimo ciklo vertinimas, Daugiakriterinė analizė
 The title of Anastasija Piščika’s master thesis is “Sustainable Transportation Biofuels in Latvia: a life cycle thinking approach for environmental effect and tradeoffs evaluation”. The aim of the thesis is to define a best biofuels and potential of them in transport sector in Latvia and create a methodology of defining most suitable fuel for the sustainable development using environmental, technological, economic and social parameters. This thesis consists of three chapters. The first chapter is dedicated to the analysis of scientific literature on biofuel types and production technologies, as well as several of their specific properties, and a review of the regulatory framework for biofuels. The second chapter describes the methodology, which consists of several steps – expert survey, application of qualitative and quantitative methods, use of environmental life cycle assessment approach and multi-criteria analysis. The third chapter is devoted to the analysis of the results obtained after applying the methodology. The volume of work is 69 pp. without attachments and list of literature. It contains 35 figures, 20 tables, 5 formulas, 101 literature sources were used. At the end of the work there is 1 appendix.
 Raktiniai žodžiai: Biofuel, Life Cycle Assessment, Multi Criteria Analysis
 Sintija Kalna
 Energijos perėjimo prie politikos aklosios zonos - Latvijos atvejo analizė
 doc. dr. Rasa Vaiškūnaitė
 Magistro darbo autorė: Sintija Kalna Magistro darbo vadovai: Dagnija Blumberga, Dr.habil.sc.ing., RTU Profesorė, instituto direktorė Dace Lauka, Dr.sc.ing., RTU Vedančioji mokslo darbuotoja, lektorė Rasa Vaiškūnaitė, dr., Doc. prof., VGTU profesorė Magistro darbo tema: Energetikos perėjimo politikos aklosios zonos – Latvijos atvejo analizė. Magistro darbo tikslas: Parengti vieningą energetikos politikos instrumentų įtakos analizės metodiką, į kurią įeina anksčiau nenustatytų problemų (aklųjų zonų) nustatymas, atsižvelgiant į praėjusio planavimo laikotarpio priemonių vertinimo rezultatus. Pagrindiniai nagrinėjami klausimai ir rezultatai: Iki šiol sukaupta patirtis parodė, kad priemonių, įtrauktų į energetikos politikos dokumentus, vertinimas yra nepilnavertis, nes nebuvo atsižvelgta į paramos instrumentų akląsias zonas. Magistro darbą sudaro: 1. Analitinė dalis, apimanti teisės aktų ir literatūros šaltinių analizę, energetikos politikos įgyvendinimo ir trijų ekonominės paramos instrumentų (privalomo pirkimo komponenčių, Europos Sąjungos finansavimo ir klimato kaitos finansų instrumentų) vertinimą; 2. Tiriamoji dalis, apimanti ekonominės paramos instrumento indikatorių nustatymą (aklųjų zonų ir politinių problemų nustatymą) ir klimato kaitos finansinių instrumentų monitoringo duomenų vertinimą. Ekonominės paramos instrumentai buvo vertinami remiantis teoriniu metodu. Vertinant santykio su kitais politiniais instrumentais, priežastingumo ir sėkmės/klaidos faktorius, nustatyti susiję indikatoriai. Savo ruožtu klimato kaitos finansinių instrumentų monitoringo duomenims analizuoti buvo naudojamas regresijos metodas. 3. Rezultatų dalis, kurią sudaro gautų rezultatų įvertinimas, rekomendacijų paruošimas ir vieningos energetikos politikos instrumentu poveikio analizės metodikos sukūrimas, ir tuo pačiu anksčiau nenustatytų problemų (aklųjų zonų) identifikavimas. Magistro darbo bibliografinį sąrašą sudaro 51 literatūros šaltinis. Darbą sudaro 3 skyriai ir 71 puslapiai. Darbe yra 7 lentelės, 16 iliustrac, ir 1 priedai. Magistro darbas parašytas anglų kalba.
 Raktiniai žodžiai: Raktažodžiai: energetikos politika, ekonominės paramos instrumentai, atsinaujinantys energijos ištekliai, pereinamojo laikotarpio politika, aklosios zonos.
 Author: Sintija Kalna Supervisors: Dagnija Blumberga, Dr.habil.sc.ing. Dace Lauka, Dr.sc.ing. Rasa Vaiškūnaitė, Dr. Title: Blind spots of energy transition policy – case study of Latvia Aim: Develop a common methodology for the impact analysis of energy policy instruments, that includes identifying previously unexpected problems (blind spots), taking into account the results of the previous evaluation of measures during the planning period. Key issues and results: The experience thus far has shown that measures included in the energy policy documents are underestimated and the blind spots of the support instruments have not been taken into account. The Master Thesis consists of: 1. Analytical part, which includes analysis of energy legislative, literature analysis of the implementation of energy policies and three financial support mechanism assessment (mandatory procurement component, European Union funding, the climate change financial instrument). 2. Research part, which includes identification of the indicators (identification of the blind spots and definition of the political problems) to the financial support instruments and monitoring data assessment of the climate change financial instrument. Economic support instruments have been assessed to the theory-based policy evaluation, which includes assessment of four parts: the first one relation with other instruments, the second one cause-impact relation, the third one success and fail factor and the fourth one resulting indicators. A regression method has been used for the analysis of the monitoring data of the climate change financial instrument. 3. Results, including the evaluation of the results obtained, the development of recommendations and the development of a common methodology for the impact analysis of energy policy instruments, including the identification of previously unexpected problems (blind spots). The bibliographic - 51 sources of literature. The Thesis consists of 3 sections and 71 pages, including 7 tables, 16 figures and 1 appendix.
 Raktiniai žodžiai: Key words: energy policy, financial support instruments, renewable energy resources, transition policy, blind spots.
 Vandens nuostolių Aukštųjų Panerių ir Pilaitės rajonuose (Vilniaus m.) mažinimas
 Baigiamajame magistro darbe "Vandens nuostolių Aukštųjų Panerių ir Pilaitės rajonuose (Vilniaus m.) mažinimas" apskaičiuoti fiziniai vandens nuostoliai Aukštųjų Panerių ir Pilaitės rajonuose (Vilniaus m.); atliktas vandentiekio tinklų zonavimas, nustatyti naktiniai debitai zonose, atlikta nuostolių paieška įvairiais metodais, apskaičiuotas zonavimo projekto atsiperkamumas, parengta sekančių zonų reitingavimo metodika, nustatytos sekančios zonavimui tęsti zonos Vilniaus mieste. Tyrimo metu buvo nustatytas minimalus naktinis Aukštųjų Panerių zonoje - 100-120 m3/h, Pilaitės rajone 21 m3/h . Analizuoti bendrieji nuostoliai zonose kiekvieną mėnesį, pasiektas rezultatas A. Paneriuose 4-8%, Pilaitėje 0,12%. Atlikta vandens nuostolių paieška naudojant zonavimui skirtus debitomačius ir tinklo perjungimo darbus. Atliekant tyrimą surasta 12 nutekėjimų zonose. Paskaičiuotas zonavimo atsiperkamumas A. Paneriuose 98 d., Pilaitėje 170 d. Atlikus zonavimą parengta kitų zonų parinkimo metodika. Pagal keturis kriterijus išreitinguotas visas Vilniaus miestas. Kitos zonos parinktos Naujos Vilnios ir Antavilių zonos. Darbą sudaro 6 dalys: įvadas, literatūros apžvalga, tyrimų metodika, rezultatų aptarimas, išvados, literatūros sąrašas. Darbo apimtis - 66 p. teksto be priedų, 30 iliustracijų, 15 lentelių, 41 bibliografinis šaltinis.
 Raktiniai žodžiai: Vandens nuostoliai, tinklų zonavimas, nuostolių mažinimas, vandens balansas, minimalus naktinis debitas.
 In the master thesis "Water losses reduction in Aukstieji Paneriai ir Pilaite districts (Vilniaus city)" calculated water losses in the districts of Aukštųjų Paneriai and Pilaitė (Vilnius m.); water zoning network was accomplished,, night flows in zones were detected, the search for losses was carried out by various methods, the payback of the zoning project was calculated, the methodology for ranking the following zones was developed, the following zones were established for the continuation of zoning in Vilnius. The study established a minimum nighttime water consuption for Aukstieji Paneriai - 100-120 m3/h, in the Pilaitė district 21 m3/h . Analyze the total losses in zones each month, the result was achieved in A. Paneris 4-8%, Pilaitė 0.12%. A water loss search has been detected using zoning flowmeters and network switching works. The investigation found 12 leakages in the zones. Estimated zoning payback in A. Paneriuose 98 days, Pilaitė 170 days. After zoning, a methodology has been developed for the selection of other zones. According to four criteria, the whole city of Vilnius was ranked. The following zones are paring new zones of Nauja Vilnia and Antaviliai. The work consists of 6 parts: introduction, literature review, research methodology, discussion of results, conclusions, literature list.
 Raktiniai žodžiai: water loss, network zoning, loss reduction, water balance, minimum night-time water consumption.
 Mark Narvoiš
 Oro taršos Vilniaus miesto mažaaukščių namų kvartaluose tyrimas, vertinimas ir modeliavimas
 Baigiamajame magistro darbe buvo ištirta 20 skirtingų Vilniaus miesto mažaaukščių namų kvartalų. Atliekant matavimus buvo ištirtos azoto dioksidų, sieros dioksidų, anglies monoksidų bei lakiųjų organinių junginių koncentracijos. Buvo vertinami visi metų laikai: žiema, pavasaris, vasara ir ruduo. Taip pat sumodeliuota teršalu sklaida siekiant įvertinti skirtingu kuru kūrenančių 10 gyvenamųjų namų oro teršalų sklaidą tipiniame, mažaaukščių namų kvartale. Pirmame skyriuje buvo išanalizuota literatūra, susijusi su oro tarša Vilniaus mieste, skirtingų taršos šaltinių įtaka oro kokybei, globalinės oro užterštumo problemomis, oro teršalų pobūdžiais, meteorologinių sąlygų įtakomis oro taršai bei aplinkos oro taršos modeliavimu. Antrame skyriuje buvo aprašyta tyrimų metodika. Trečiajame skyriuje pateikti mažaaukščių namų kvartalų oro kokybės tyrimo rezultatai ir jų analizė. Ketvirtajame skyriuje buvo išanalizuotas teršalų modeliavimas. Darbo pabaigoje pateiktos išvados, rekomendacijos bei literatūros sąrašas. Darbą sudaro 8 dalys: įvadas, literatūros apžvalga, tyrimų metodikos, tyrimų rezultatai ir jų analizė, teršalų modeliavimas, išvados, rekomendacijos ir literatūros sąrašas. Darbo apimtis: 69 psl., 46 paveikslų, 9 lentelės, 54 literatūros šaltiniai.
 Raktiniai žodžiai: Oro tarša, pasyvieji kaupikliai, mažaaukščiai namų kvartalai, oro kokybė, teršalų sklaida
 In the final master's thesis, 20 different blocks of low-rise houses in Vilnius were studied. Concentrations of nitrogen dioxide, sulfur dioxide, carbon monoxide and volatile organic compounds were investigated during the measurements. All seasons were evaluated: winter, spring, summer and autumn. Pollutant dispersion was also modeled to estimate the dispersion of air pollutants in 10 residential homes burning different fuels in a typical, low-rise quarter. The first chapter analyzed the literature related to air pollution in Vilnius, the impact of different pollution sources on air quality, global air pollution problems, the nature of air pollutants, the impact of meteorological conditions on air pollution and modeling of ambient air pollution. The second chapter described the research methodology. The third chapter presents the results of the air quality survey of low-rise housing estates and their analysis. In the fourth section, pollutant modeling was analyzed. At the end of the work, conclusions, recommendations and references are presented. The work consists of 8 parts: introduction, literature review, research methodologies, research results and their analysis, pollution modeling, conclusions, recommendations and references.
 Raktiniai žodžiai: Air pollution, passive samplers, low-rise blocks, air quality, dispersion of pollutants
 Eglė Dobilaitė
 Kompostuojamų maišelių biologinio skaidumo vertinimas ir namudinio kompostavimo metodas atsižvelgiant į tvarumo perspektyvą Lietuvoje ir Latvijoje
 Magistro darbe kompostavimas namuose buvo apželgtas iš tvarumo perspektyvos. Kompostuojami maišai buvo pateikti kaip atvejo analizė pasirinktoje savivaldybėje. Siekiant įvertinti su namudinio kompostavimo procesu susijusias aplinkos apkrovas, atlikta aplinkos rodiklių analizė. Atlikta integruota SSGG analizė su daugiakriterinio vertinimo metodu TOPSIS, kad būtų galima nustatyti tinkamą sprendimų priėmimo procesą įvardinant pramoninio ir namudinio kompostavimo stiprybes, silpnybes, galimybes ir grėsmes. Darbo tikslas - įvertinti ir išanalizuoti decentralizuotą sistemą (namų kompostavimą) tvarumo požiūriu, įgyvendinant kompostuojamus maišus kaip įrankį, didinantį atskirų maisto atliekų surinkimą ir kompostavimą, ir paremti "nulis atliekų“ strategiją. Pirmame darbo skyriuje atlikta literatūros apžvalgos analizė: išnagrinėta dabartinė maisto švaistymo situacija ir tvarkymo galimybės globaliu, Europos, Lietuvos ir Latvijos mastu. Buvo išanalizuotos maisto švaistymo ir tvarkymo norminės bazės bei įstatymai. Apibrėžti pagrindiniai kompostuojamų ir biologiškai skaidžių medžiagų bei jų sertifikavimo skirtumai. Antrame skyriuje buvo pristatyta tyrimo metodika, apimanti atvejo savivaldybės aprašymą, rodikliais pagrįstos analizės principus, eksperimento struktūrą ir SSGG-TOPSIS analizės pagrindus. Trečiajame skyriuje buvo pateikti tyrimo rezultatai. Namų kompostavimo analizė savivaldybėje atlikta atliekant aplinkos rodiklių analizę ir palyginant centralizuotą ir decentralizuotą kompostavimo variantus, remiantis kokybiniu SSGG-TOPSIS metodu. Darbas baigiamas išvadomis ir rekomendacijomis, nuorodomis ir autorių publikacijomis.
 Raktiniai žodžiai: maisto švaistymas; kompostuojami maišeliai; biologinis skaidumas; namų kompostavimas; pramoninis kompostavimas; darnus vystymasis.
 In the Master thesis home composting approach was observed from a sustainability perspective. Therefore, compostable bags were analysed in the home composting conditions within the experiment. Aiming to estimate the environmental loads related to the home composting process, a case municipality was selected and environmental indicator analysis was performed. Afterward an integrated SWOT-TOPSIS analysis was implemented in order to determine an appropriate decision-making process in terms of the industrial and the home composting applications. The aim of the thesis is to evaluate and analyse decentralized system (home composting) from a sustainability perspective in terms of implementation of compostable bags as a tool to increase separate food waste collection and composting, and support zero-waste strategy. In the first chapter of the thesis, the analysis of the literature review was performed: the current situation of food waste and management options was examined on a global, European, Lithuanian and Latvian scale. The regulatory frameworks in terms of food waste and management and laws were analyzed. The main differences of compostable and biodegradable materials and its certification were defined. In the second chapter a methodology of the research was presented, including description of the case municipality, principles of the indicator-based analysis, experiment structure and basics of the SWOT-TOPSIS analysis. In the third chapter the results of the research were presented. The analysis of home composting in the case municipality has been done within environmental indicator analysis and pairwise comparison of centralized and decentralized composting options based on qualitative SWOT-TOPSIS method. The thesis is finalised with conclusions and recommendations, references and authors publications.
 Raktiniai žodžiai: food waste; compostable bag; biodegradability; home composting; industrial composting; sustainable development.
 Valytų buitinių nuotekų dezinfekavimo ultravioletiniais spinduliais tyrimas
 doc. dr. Regimantas Dauknys
 Būtina pašalinti patogenines medžiagas iš valytų nuotekų dėl jų sukeliamo pavojaus žmonių sveikatai ir aplinkai bei rasti ekonomišką, efektyvų, paprastą vartotojui sprendimą. Darbe tiriamos dvi buitinių nuotekų dezinfekavimo ultravioletine spinduliuote sistemos. Jungtinių Amerikos valstijų gamintojo „Secor“ panardinamojo tipo įranga bei Paul August ir Ladislav Penzes kurtas nepanardinamojo tipo lempų prototipas. Tyrimo metu sistemų darbas buvo tiriamas dezinfekuojant mažo našumo nuotekų valymo įrenginio nuotekas. Surinkti duomenys apdoroti ir rasta koreliacija tarp BDS7 rodiklio ir E. coli kiekio nuotekose. Panardinamojo tipo sistemos rezultatai viso tyrimo metu prastėjo, nuo 20 vnt./100 ml iki 120 vnt./100 ml. Bekontakčio dezinfekavimo rezultatai išliko pastovūs ir svyravo nuo 10 iki 23 vnt./100 ml. Atidarius abi sistemas pastebėta, jog kontaktinio dezinfekavimo sistema yra aptraukta nuosėdų, būtina priežiūra, kuri be specialios įrangos neįmanoma. Bekontakčio dezinfekavimo įranga yra švari, gali toliau funkcionuoti. Bekontaktis dezinfekavimo būdas yra efektyvesnis ir reikalaujantis mažiau priežiūros.
 Raktiniai žodžiai: dezinfekavimas, e. coli, bekontaktis, kontaktinis, patogeninis
 It is important to remove pathogenic materials out of treated wastewater because of its danger to human health and nature. Also to find economical, efficient and simple solution for end user. In this thesis two ultraviolet disinfection systems are beeing tested. Submersible one produced by „Secor“ and indirect contact prototype created by Paul August and Ladislav Penzes. During test small wastewater treatment plants effluent was used. Collected data showed corellation between BOD7 and amount of E. coli in wastewater. Submersible system had decreasing results from 20 units/100ml. To 120 units/100ml. Contactless system had stable results varying from 10 units/100ml. To 23 units/100ml. After opening both systems, submersible one had visual sedimentation on the UV unit, what explains de decrease in results. It requires thurough servicing, which requires special equipment. Contacless system was clean, can be used without seervicing. Contactless method is more efficient and requires less maintinance.
 Raktiniai žodžiai: disinfection, e. coli, submersible, contactless, pathogenic