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Experimental evidence for aerobic bio-denitriflcation

Chinese Science Bulletin 2000年第S1期45卷 86-89页

作者： DING Aizhong, FU Jiamo & SHENG GuoyingKey Laboratory of Resources Utilization and Environment Protection of Guangdong Province, Guangzhou 510640, China State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China Correspondence should be addressed to Ding Aizhong

Nitrate pollution of groundwater is paid more and more attention for its hazardous to environments and human health. A strain of DN11 was isolated from soil and used in the laboratory columns filled with various media for nitrate removal. The experimental results showed that DN11 could reduce nitrate at different rates in different media under the aerobic condition. The mechanism for nitrate removal with DN11 is explained meanwhile.

关键词： nitrate pollution denitriflcation aerobic laboratory column.

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Effects of different external carbon sources and electron acceptors on interactions between denitrification and phosphorus removal in biological nutrient removal processes

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2018年第4期19卷 305-316页

作者： Xiang HU Dominika SOBOTKA Krzysztof CZERWIONKA Qi ZHOU Li XIE Jacek MAKINIA Anhui Guozhen Environmental Protection Sci.& Tech.Co. Ltd. Faculty of Civil and Environmental Engineering Gdansk University of Technology State Key Laboratory of Pollution Control and Resources Reuse Tongji University

The effects of two different external carbon sources （acetate and ethanol） and electron acceptors （dissolved oxygen, nitrate, and nitrite） were investigated under aerobic and anoxic conditions with non-acclimated process bi- omass 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/（g MLVSS.h）（MLVSS： mixed liquor volatile suspended solids）, 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 deni- trification rates were obtained with acetate （1.4 and 0.8 mg N/（g MLVSS.h）） compared to ethanol （1.1 and 0.7 mg N/ （g MLVSS.h）） for both anoxic electron acceptors （nitrate and nitrite）.

关键词： Biological nutrient removal (BNR) denitriflcation Enhanced biological phosphorus removal (EBPR) External carbon source Electron acceptor

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