Denitrificirajuća defosfatacija preko nitrita

master's thesis

• Title (english): Denitrifying dephosphatation over nitrite
• Author: Neven Marković
• 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: 2015-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

U ovom radu istražena je denitrificirajuća defosfatacija otpadne vode u anoksičnim uvjetima. Kao izvor ugljika korišten je natrijev acetat pri omjerima (i) C/NO2-N = 1 početne koncentracije 24,1 mg NO2-N/L i 11,2 mg PO4-P/L; (ii) C/NO2-N = 2 početne koncentracije 23,9 mg NO2-N/L i 12,0 mg PO4-P/L; (iii) C/NO2-N = 3 početne koncentracije 25,2 mg NO2-N/L i 12,3 mg PO4-P/L; (iv) C/NO2-N = 4 početne koncentracije 25,8 mg NO2-N/L i 10,4 mg PO4-P/L; (v) C/NO2-N = 7 početne koncentracije 23,2 mg NO2-N/L i 10,9 mg PO4-P/L. Pokazano je da aktivni mulj provodi proces denitrificirajuće defosfatacije u anoksičnim uvjetima, pri koncentraciji otopljenog kisika DO≤0,4 mg/L. Natrijev acetat se pokazao kao povoljan izvor ugljika za denitrificirajuću defosfataciju. Omjer C/NO2-N = 4 dostatan je za potpunu denitrifikaciju u istraživanim uvjetima. Maksimalna količina uklonjenog fosfora je pri istraživanim uvjetima 24,5±1,3 mg NO2-N/L pri omjeru N/P 2,1 i pri omjerima C/NO2-N = 4 i C/NO2-N = 7, iznosila 72,1% i 71,6%.

Abstract (english)

In this paper denitrifying dephosphatation of wastewater under anoxic conditions was evaluated. Sodium acetate was used as the carbon source, at ratios: (i) C/NO2-N = 1 initial concentration 24,1 mg NO2-N/L and 11,2 mg PO4-P/L; (ii) C/NO2-N = 2 initial concentration 23,9 mg NO2-N/L and 12,0 mg PO4-P/L; (iii) C/NO2-N = 3 initial concentration 25,2 mg NO2-N/L and 12,3 mg PO4-P/L; (iv) C/NO2-N = 4 initial concentration 25,8 mg NO2-N/L and 10,4 mg PO4-P/L; (v) C/NO2-N = 7 initial concentration 23,2 mg NO2-N/L and 10,9 mg PO4-P/L. The obtained results showed that activated sludge carried out process of denitrifying dephosphatation under anoxic conditions, at a dissolved oxygen concentration of DO≤0,4 mg/L. Sodium acetate was a good carbon source for denitrifying dephosphatation. Ratio C/NO2-N = 4 was sufficient for complete denitrification under investigated conditions. The highest amount of phosphorus removal under investigated conditions of 24,5±1,3 mg NO2-N/L with ratio N/P 2,1 and C/NO2-N = 4 and C/NO2-N = 7, was 72,1% i 71,6%.

• Keywords: defosfatacija; denitrifikacija; anoksični uvjeti; otpadna voda; DPAO
• Keywords (english): dephosphatation; denitrification; anoxic conditions; wastewater; DPAO
• Language: croatian
• URN:NBN: urn:nbn:hr:159:339440
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-05-04 08:28:30