An anoxic/oxic membrane bioreactor (MBR) and three side-stream reactor (SSR) coupled membrane bioreactors were operated in parallel to investigate effects of dissolved oxygen (DO) level in SSR on sludge reduction and microbial community structure of SSR-MBAs. The four MBAs were equally efficient in COD and ammonium nitrogen removal. The anaerobic and micro-aerobic SSR favored nitrogen removal through denitrification, simultaneous nitrification and denitrification and autochthonous substrate release as carbon source. The microaerobic SSR achieved greatly higher sludge reduction efficiency (61.1%) than anaerobic (37.3%) and aerobic SSR (7.9%). Micro-aerobic SSR obtained the highest endogenous decay constant (0.035 d(-1 )) compared to anaerobic (0.023 d(-1 )) and aerobic SSR (0.015 d(-1 ) ). High-throughput sequencing results revealed that anaerobic SSR enriched hydrolytic and fermentative bacteria, aerobic environment favored the growth of slow-growing bacteria, and micro-aerobic SSR stimulated biological activities of both anaerobic and aerobic bacteria.
机构:
Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Niu, Tianhao
;
Zhou, Zhen
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Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Zhou, Zhen
;
Shen, Xuelian
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Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Shen, Xuelian
;
Qiao, Weimin
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Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Qiao, Weimin
;
Jiang, Lu-Man
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Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Jiang, Lu-Man
;
Pan, Wei
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Shanghai Municipal Sewerage Co Ltd, Shanghai 200233, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Pan, Wei
;
Zhou, Jijun
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Shanghai Municipal Sewerage Co Ltd, Shanghai 200233, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
机构:
Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Niu, Tianhao
;
Zhou, Zhen
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机构:
Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Zhou, Zhen
;
Shen, Xuelian
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h-index: 0
机构:
Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Shen, Xuelian
;
Qiao, Weimin
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h-index: 0
机构:
Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Qiao, Weimin
;
Jiang, Lu-Man
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机构:
Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Jiang, Lu-Man
;
Pan, Wei
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h-index: 0
机构:
Shanghai Municipal Sewerage Co Ltd, Shanghai 200233, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
Pan, Wei
;
Zhou, Jijun
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h-index: 0
机构:
Shanghai Municipal Sewerage Co Ltd, Shanghai 200233, Peoples R ChinaShanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China