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Sludge reduction and microbial structures of aerobic, micro-aerobic and anaerobic side-stream reactor coupled membrane bioreactors
Bioresource Technology ( IF 9.7 ) Pub Date : 2018-07-21 , DOI: 10.1016/j.biortech.2018.07.097
Hongjian Pang , Zhen Zhou , Tianhao Niu , Lu-Man Jiang , Guang Chen , Biao Xu , Lingyan Jiang , Zhan Qiu

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-MBRs. The four MBRs 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 micro-aerobic 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.



中文翻译:

好氧,微好氧和厌氧侧流反应器耦合膜生物反应器的污泥减少和微生物结构

并联运行一个缺氧/氧化膜生物反应器(MBR)和三个侧流反应器(SSR)耦合的膜生物反应器,以研究SSR中的溶解氧(DO)水平对SSR-MBR的污泥减少和微生物群落结构的影响。四个MBR在去除COD和去除铵态氮方面同样有效。厌氧和微好氧的SSR有利于通过反硝化,同时硝化和反硝化以及自生底物的释放作为碳源来脱氮。与好氧(37.3%)和好氧SSR(7.9%)相比,微好氧SSR的污泥减少效率(61.1%)大大提高。与好氧(0.023 d -1)和好氧SSR(0.015 d )相比,微好氧SSR的内生衰减常数最高(0.035 d -1)。-1)。高通量测序结果表明,厌氧SSR丰富了水解和发酵细菌,好氧环境有利于缓慢生长的细菌的生长,微需氧SSR刺激了厌氧和需氧细菌的生物活性。

更新日期:2018-07-21
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