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Effects of different external carbon sources and electron acceptors on interactions between denitrification and phosphorus removal in BNR processes
Abstract
The effects of two different external carbon sources (acetate, ethanol) and electron acceptors (dissolved oxygen, nitrate and nitrite) were investigated under aerobic and anoxic conditions with non-acclimated process biomass from a full-scale biological nutrient removal activated sludge system. When acetate was added as an external carbon source, phosphate release was observed even in the presence of electron acceptors. The release rates were 1.7, 7.8 and 3.5 mg P/(gMLVSS·h), respectively, for dissolved oxygen, nitrate and nitrite. In the case of ethanol, no phosphate release was observed in the presence of electron acceptors. Results of the experiments with nitrite showed that approximately 25 mg NO2-N/L of nitrite inhibited anoxic phosphorus uptake regardless of the concentration of the tested external carbon sources. Furthermore, higher denitrification rates were obtained with acetate (1.4 and 0.8 mg N/(gMLVSS·h)) compared to ethanol (1.1 and 0.7 mg N/(gMLVSS·h)) for both anoxic electron acceptors (nitrate and nitrite).
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Authors (6)
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Hu Xiang
- 1Anhui Guozhen Environmental Protection Sci. & Tech. Co., Ltd., Hefei 230000, Anhui, China
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Qi Zhou
- 3State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
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Li Xie
- 3State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
Journal of Zhejiang University-SCIENCE B
no. 19,
pages 305 - 316,
ISSN: 1673-1581 - Language:
- English
- Publication year:
- 2018
- Bibliographic description:
- Xiang H., Sobotka D., Czerwionka K., Zhou Q., Xie L., Mąkinia J.: Effects of different external carbon sources and electron acceptors on interactions between denitrification and phosphorus removal in BNR processes// Journal of Zhejiang University-SCIENCE B. -Vol. 19, iss. 4 (2018), s.305-316
- DOI:
- Digital Object Identifier (open in new tab) 10.1631/jzus.b1700064
- Verified by:
- Gdańsk University of Technology
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