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master's thesis
Nitrit kao akceptor elektrona u denitrifikaciji
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. urn:nbn:hr:159:340653
Frketić, Mihaela
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Food Engineering
Laboratory for the Biological Waste Water Treatment

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

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Frketić, M. (2023). Nitrit kao akceptor elektrona u denitrifikaciji (Master's thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:340653

Frketić, Mihaela. "Nitrit kao akceptor elektrona u denitrifikaciji." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. https://urn.nsk.hr/urn:nbn:hr:159:340653

Frketić, Mihaela. "Nitrit kao akceptor elektrona u denitrifikaciji." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. https://urn.nsk.hr/urn:nbn:hr:159:340653

Frketić, M. (2023). 'Nitrit kao akceptor elektrona u denitrifikaciji', Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 29 June 2024, https://urn.nsk.hr/urn:nbn:hr:159:340653

Frketić M. Nitrit kao akceptor elektrona u denitrifikaciji [Master's thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2023 [cited 2024 June 29] Available at: https://urn.nsk.hr/urn:nbn:hr:159:340653

M. Frketić, "Nitrit kao akceptor elektrona u denitrifikaciji", Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:159:340653

Metadata
TitleNitrit kao akceptor elektrona u denitrifikaciji
Title (english)Nitrite as an electron acceptor in denitrification
AuthorMihaela Frketić
MentorDijana Grgas (mentor)
Committee memberTibela Landeka Dragičević (predsjednik povjerenstva)
Committee memberTonči Rezić (član povjerenstva)
Committee memberAntonija Trontel (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Food Engineering)
(Laboratory for the Biological Waste Water Treatment)
Zagreb
Defense date and country2023-12-20, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Uklanjanje dušika iz otpadne vode preko nitrita (denitritacija) pruža prednosti u usporedbi s denitrifikacijom. U ovom radu istražena je denitritacija korištenjem visoke početne koncentracije nitrita, 70 ± 5 mg NO₂-N/L. Pokusi su vođeni u anoksičnim uvjetima pri 3 ± 0,2 g MLSS (engl. Mixed Liquor Suspended Solids, MLSS, hrv. Suspendirane čestice miješane tekućine)/L dok je kao izvor ugljika korišten acetat pri omjerima C/N (ugljik/dušik) 1, 2, 3 i 4. Praćene su promjene vrijednosti KPK (Kemijska potrošnja kisika), nitrita, slobodne nitritne kiseline, nitrata, pH vrijednosti, temperature, koncentracije otopljenog kisika. Izračunate su brzine uklanjanja nitrita i KPK te omjer utrošene količine KPK za redukciju nitrita. Omjeri C/N 1 i 2 rezultirali su nepotpunom denitritacijom, uklonjeno je 46,5 % i 83,6 % nitrita zbog limitacije elektron donorima (organskim sastojcima), dok je pri omjerima C/N 3 i 4 postignuta potpuna denitritacija. Raspon vrijednosti unutar kojeg se kretala brzina redukcije nitrita pri svim ispitanim omjerima C/N iznosi 26,4 – 27,6 mg NO₂-N/Lh.
Abstract (english)
The removal of nitrogen from wastewater via nitrite offers advantages compared to denitrification. In this work, denitritation was investigated using a high initial concentration of nitrite, 70 ± 5 mg NO₂-N/L. The experiments were conducted under anoxic conditions at 3 ± 0.2 g MLSS/L, while acetate was used as a carbon source at C/N ratios of 1, 2, 3 and 4. Changes in COD values, nitrite, free nitrous acid, nitrate, pH value, temperature, dissolved oxygen were monitored. Removal rates of nitrite and COD, and the ratio of the amount of COD used for nitrite reduction, were calculated. C/N ratios of 1 and 2 resulted in incomplete denitritation due to limitation of electron donor (organics), 46.5% and 83.6% of nitrite was removed, while complete denitritation was achieved at C/N ratios of 3 and 4. The achieved nitrite reduction rates at all C/N ratios were in the range 26.4 – 27.6 mg NO₂-N/Lh.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:340653
Study programmeTitle: Bioprocess Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka bioprocesnog inženjerstva (magistar/magistra inženjer/inženjerka bioprocesnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) icon
Created on2024-05-28 12:46:56