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Characteristics and fate of organic nitrogen in municipal biological nutrient removal wastewater treatment plants
Abstrakt
The aim of this study was to investigate the occurrence and fate of colloidal and dissolved organic nitrogen (CON and DON) across biological nutrient removal (BNR) activated sludge bioreactors. Primary and secondary effluent total nitrogen (TN) measurements and component fractionation, CON and DON concentration profiles across BNR bioreactors, and laboratory batch experiments with the process mixed liquor were carried out at several full-scale BNR plants in northern Poland. The organic nitrogen (ON) components were divided into high CON, low CON, and DON based on sequential filtration through 1.2, 0.45 and 0.1 µm pore size filters. The average influent DON0.1μm (<0.1 μm) concentrations ranged from 1.1 g N/m3 to 3.9 g N/m3 and accounted for only 4-13% of total organic nitrogen. In the effluents, however, this contribution increased to 12-45% (the DON0.1μm concentrations varied in a narrow range of 0.5-1.3 g N/m3). Conversions of ON inside the bioreactors were investigated in more detail in two largest plants, i.e. Gdansk (565,000 PE) and Gdynia (516,000 PE). Inside the two studied bioreactors, the largest reductions of the colloidal fraction were found to occur in the anaerobic and anoxic compartments, whereas an increase of DON0.1μm concentrations was observed under aerobic conditions in the last compartment. Batch experiments with the process mixed liquor confirmed that DON0.1μm was explicitly produced in the aerobic phase and significant amounts of ON were converted in the anoxic phase of the experiments.
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Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.watres.2012.01.020
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otwiera się w nowej karcie
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
WATER RESEARCH
nr 46,
ISSN: 0043-1354 - Język:
- angielski
- Rok wydania:
- 2012
- Opis bibliograficzny:
- Czerwionka K., Mąkinia J., Pagilla K., Stensel H.: Characteristics and fate of organic nitrogen in municipal biological nutrient removal wastewater treatment plants// WATER RESEARCH. -Vol. 46, nr. iss. 7 (2012),
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 128 razy
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