Izvori ugljika za biološku denitrifikaciju

undergraduate thesis

• Title (english): Carbon sources for biological denitrification
• Author: Marko Zbodulja
• Mentor: Tibela Landeka Dragičević (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for the Biological Waste Water Treatment); Zagreb
• Defense date and country: 2014-06-17, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

Denitrifikacija je važan disimilatorni proces u okolišu sa niskom koncentracijom kisika u kojem se nitrat reducira do plinovitog dušika postupkom u četiri koraka koji uključuje intermedijere: nitrit, dušikov(I) oksid i dušikov(II) oksid, a transfer elektrona u denitrifikaciji je povezan sa fosforilacijom. Od više metoda najčešće se koristi biološki proces. Na proces biološke denitrifikacije utječu razni čimbenici kao što su: temperatura, pH, koncentracija nitrata, prisutnost otopljenog kisika, alkalinitet i dr. Različiti organski sastojci, čisti kemijski spojevi ili sastojci u otpadnoj vodi mogu biti izvori ugljika (donori) za redukciju nitrata. Pri izboru ugljika na efikasnost procesa biološke denitrifikacije treba uzeti u obzir čimbenike kao što su: brzina, cijena, raspoloživost, sigurnost i dr. Kao izvor ugljika najčešće se koriste metanol, etanol i acetat, a još se mogu koristiti i: metan, octena kiselina, glukoza, melase, primarni mulj, hidrolizirana riža i dr.

Abstract (english)

Denitrification is an important dissimilatory process in low oxygen environments where the nitrate is reduced to dinitrogen by a four step process involving intermediates nitrite, nitric oxide and nitrous oxide and the electron transfer in denitrification is coupled to phosphorylation. From many different methods, biological process is most commonly used. Different parameters, such as: temperature, pH, nitrate concentration, the presence of dissolved oxygene, alkalinity, etc. affect the process of biological denitrification. Various organic ingredients, pure chemical compounds or ingridients in wastewater can be source of carbon (donors) for the nitrate reduction. When selecting the carbon source for efficiency of biological denitrification process we should take into account factors such as: rate, price, availability, safety and other. Methanol, ethanol and acetate are most commonly used carbon sources for biological denitrification . The other carbon sources that can be used include: methane, acetic acid, glucose, molasses, primary sludge, hydrolysed rice and other.

• Keywords: denitrifikacija; čimbenci denitrifikacije; izvori ugljika
• Keywords (english): denitrification; parameters of denitrification process; carbon sources
• Language: croatian
• URN:NBN: urn:nbn:hr:159:967169
• Study programme: Title: Food Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-04-26 10:41:20