Application of two anaerobic membrane bioreactors with different pore size membranes for municipal wastewater treatment
Application of two anaerobic membrane bioreactors with different pore size membranes for municipal wastewater treatment
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DOI：
10.1016/j.scitotenv.2020.140903
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发表时间：
2020-11-25
影响因子：
9.8
通讯作者：
Li, Yu-You
中科院分区：
文献类型：
--
作者：
Ji, Jiayuan;Sakuma, Satoshi;Li, Yu-You
孔径是膜生物法处理城市污水成功运行的最重要的性能之一。研究了孔径为0.4 μ m和0.05 μ m的中空纤维膜厌氧膜生物反应器（AnMBR 1和AnMBR 2）在室温（25 ℃）下不同水力停留时间（HRT）下处理真实的城市污水的特性。在长期连续运行过程中，从有机物去除效率、沼气产量和膜过滤行为等方面对工艺性能进行了评价。两种AnMBR均表现出良好的有机物去除性能，COD和BOD去除率分别为89%和93%左右。实现了高能量回收潜力，沼气产率范围在0.20和0.26 L-气体/g-CODrem之间，甲烷含量约为75%。两种膜生物反应器的膜过滤行为的差异包括不同的渗透通量和总过滤阻力（R-t）。在具有0.4 μ m孔径膜的AnMBR中，即使当渗透通量为0.274 m/天的高通量时，也获得1.08 × 10 - 4布尔和12 m（-1）的平均R-t，而较高的平均R-t为1.51 x 10 boolean AND 12 m（-1）在孔径为0.05 μ m的膜的AnMBR中，即使当通量为0.148 μ m/天时，也观察到了AnMBR 1的离线膜清洗策略表明，膜修复效率为90.2%。(C)2020爱思唯尔B. V.保留所有权利。
Pore size is one of the most important properties in the successful operation of membrane-based bioprocesses for the treatment of municipal wastewater. The characteristics of two anaerobic membrane bioreactors (AnMBRs), one with a hollow fiber membrane of 0.4 mu m pore size (AnMBR1), and the other with a membrane of 0.05 mu m pore size (AnMBR2) were investigated for the treatment of real municipal wastewater at room temperature (25 degrees C) under varied hydraulic retention times (HRTs). Process performance was evaluated in terms of organic removal efficiency, biogas production and membrane filtration behaviours during a long-term continuous operation. Both AnMBRs showed good organic removal performance with COD and BOD removal efficiencies of around 89% and 93%, respectively. High energy recovery potential was achieved, with the biogas yield ranging between 0.20 and 0.26 L-gas/g-CODrem and a methane content of approximately 75%. The differences in the membrane filtration behaviours in the two AnMBRs included different permeate flux and total filtration resistance (R-t). In the AnMBR with a 0.4 mu m pore size membrane, an average R-t of 1.08 x 10 boolean AND 12 m(-1) was obtained even when the permeate flux was a high 0.274 m/day, while a higher average R-t of 1.51 x 10 boolean AND 12 m(-1) was observed in the AnMBR with 0.05 mu m pore size membrane even when the flux was a low 0.148 m/day. The off-line membrane cleaning strategy used for AnMBR1 indicated that the membrane restoration efficiency was 90.2%. (C) 2020 Elsevier B.V. All rights reserved.