Sludge reduction and microbial structures of aerobic, micro-aerobic and anaerobic side-stream reactor coupled membrane bioreactors

被引:38
作者
Pang, Hongjian [1 ]
Zhou, Zhen [1 ,3 ]
Niu, Tianhao [1 ]
Jiang, Man [1 ]
Chen, Guang [2 ]
Xu, Biao [1 ]
Jiang, Lingyan [2 ]
Qiu, Zhan [2 ]
机构
[1] Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
[2] Shanghai Chentou Wastewater Treatment Co Ltd, Shanghai 201203, Peoples R China
[3] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
基金
中国国家自然科学基金;
关键词
Sludge reduction; Side-stream reactor; Membrane bioreactor; Micro-aerobic; Microbial community; ACTIVATED-SLUDGE; COMMUNITY STRUCTURE; SIMULTANEOUS NITRIFICATION; FOULING MITIGATION; RETENTION TIME; CARBON SOURCE; PERFORMANCE; REMOVAL; SYSTEM; DENITRIFICATION;
D O I
10.1016/j.biortech.2018.07.097
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
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.
引用
收藏
页码:36 / 44
页数:9
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