Important effects of temperature on treating real municipal wastewater by a submerged anaerobic membrane bioreactor: Removal efficiency, biogas, and microbial community
Important effects of temperature on treating real municipal wastewater by a submerged anaerobic membrane bioreactor: Removal efficiency, biogas, and microbial community
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温度对浸没式厌氧膜生物反应器处理真实城市废水的重要影响：去除效率、沼气和微生物群落
DOI：
10.1016/j.biortech.2021.125306
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发表时间：
2021
影响因子：
11.4
通讯作者：
Yu-You Li
中科院分区：
文献类型：
--
作者：
Jiayuan Ji;Jialing Ni;Akito Ohtsu;Naoko Isozumi;Yisong Hu;Runda Du;Yujie Chen;Yu Qin;Kengo Kubota;Yu-You Li
采用浸没式厌氧膜生物反应器（SAnMBR）处理真实的城市污水，运行温度为15 ~ 25 °C，水力停留时间（HRT）为6 h。从有机物去除率、产气量、污泥生长和膜过滤等方面对该工艺进行了评价。在长期运行过程中，SAnMBR在20-25 °C下实现了约90%的化学需氧量去除率，并且污泥产量较低（0.12-0.19 g-VSS/g-CODrem）。在20-25 °C下，废水处理过程中产生约1.82-2.27 kWh/d的电能，在15 °C下产生0.67 kWh/d。微生物群落分析结果表明，该区域微生物群落以乙酸型产甲烷菌为主，氢营养型产甲烷菌和极少量的甲基营养型产甲烷菌偶联。碳水化合物-蛋白质降解菌和碳水化合物降解菌是微生物群落稳定的主要原因。
A submerged anaerobic membrane bioreactor (SAnMBR) was used in the treatment of real municipal wastewater at operation temperatures ranging from 15 °C to 25 °C and hydraulic retention time (HRT) of 6 h. The treatment process was evaluated in terms of organic removal efficiency, biogas production, sludge growth and membrane filtration. During long-term operation, the SAnMBR achieved chemical oxygen demand removal efficiencies of about 90% with a low sludge yield (0.12–0.19 g-VSS/g-CODrem) at 20–25 °C. Approximately 1.82–2.27 kWh/d of electric energy was generated during the wastewater treatment process at 20–25 °C, 0.67 kWh/d was generated at 15 °C. The microbial community analysis results showed that microbial community was dominated by aceticlastic methanogens, coupled by hydrogenotrophic methanogens and a very small quantity of methylotrophic methanogens. It was also shown that the stabilization of the microbial community could be attributed to the carbohydrate-protein degrading bacteria and the carbohydrate degrading bacteria.