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Impact of soluble organic matter and particulate organic matter on anammox system: Performance, microbial community and N_(2)O production

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Journal of Environmental Sciences 2023年第2期124卷 146-155页

作者： Yingying He HongyuMao jacek makinia Jakub Drewnowski Bing Wu Jun Xu Li Xie Xi Lu Key Laboratory of Yangtze Water Environment Ministry of EducationTongji UniversityShanghai 200092China Faculty of Civil and Environmental Engineering Gdansk University of TechnologyGdansk 80-233Poland

In this study,the effects of soluble readily biodegradable COD(sCOD)and particulate slowly biodegradable COD(pCOD)on anammox process were *** results of the longterm experiment indicated that a low sCOD/N ratio of 0.5 could accelerate the anammox and denitrification activity,to reach as high as 84.9%±2.8%TN removal *** denitrification-anammox(PDN/anammox)and denitrification were proposed as the major pathways for nitrogen removal,accounting for 91.3% and 8.7% of the TN removal,*** bacteria could remain active with high abundance of anammox genes to maintain its *** Kuenenia and Thauera were the predominant genera in the presence of organic *** with sCOD,batch experiments showed that the introduction of pCOD had a negative effect on nitrogen *** contribution of denitrification to nitrogen removal decreased from approximately 14%to 3% with increasing percentage of *** addition,the analysis result of the process data using an optimized ASM1 model indicated that high percentage of pCOD resulted in serious N_(2)O emission(the peak value up to 0.25mg N/L),whichwas likely due to limited mass diffusion and insufficient available carbon sources for ***,a high sCOD/N ratio was beneficial for alleviating N_(2)O accumulation.

关键词： Anammox Partial denitrification Microbial community structure Carbon composition Nitrous oxide production

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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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