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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Performance evaluation of ICAS-MBR for decentralized treatment and reuse of domestic wastewater
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Performance evaluation of ICAS-MBR for decentralized treatment and reuse of domestic wastewater

机译：ICAS-MBR在生活污水的分散处理和回用中的性能评估

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摘要

An innovative process, intermittently cyclic activated sludge membrane bioreactor(ICAS-MBR), was proposed as a process for decentralized treatment and reuse of domestic wastewater. There were two main tanks, a stirred tank and an aerated tank in the system. The membrane with pore size of 0.1 μm was immerged in the aerated tank for suction the effluent. The activated sludge liquor was intermittently recycled between the two tanks with 1 h recycling and 2h pause. In laboratory, the performance of this system was investigated with real domestic wastewater feeding for long term. It was found that with the recycling on and off, the microorganism community underwent anaerobic, anoxic and aerobic phases in space or time sequence, which enhanced the phosphorus(P) release, denitrification and P uptakes, and led obvious changes of microorganism communities and better settlement performance of the sludge liquor. The simultaneous nitrification and denitrification was improved by separated aeration in aerated tank. The contents of COD, NH_4-N, TN and TP in the effluent were reduced less than 15mg/L, 1mg/L, 15mg/L and 1mg/L, respectively. The membrane flux could be restored weekly with physical cleaning but not with chemicals.
机译：提出了一种创新的间歇式活性污泥膜生物反应器（ICAS-MBR）工艺，作为分散处理和回用生活废水的工艺。系统中有两个主罐，一个搅拌罐和一个充气罐。将孔径为0.1μm的膜浸入充气罐中，以抽吸流出物。活化的污泥液在两个罐之间间歇性地循环，循环1小时，暂停2小时。在实验室中，该系统的性能已通过长期的实际生活废水进料进行了研究。结果发现，随着循环的开和关，微生物群落在空间或时间上经历了厌氧，缺氧和好氧阶段，这增强了磷（P）的释放，反硝化和磷的吸收，并导致了微生物群落的明显变化，并且更好。污泥液的沉降性能。通过在曝气池中进行单独的曝气，可以同时硝化和反硝化。废水中的COD，NH_4-N，TN和TP含量分别降低了15mg / L，1mg / L，15mg / L和1mg / L。膜通量可以每周通过物理清洁来恢复，但不能通过化学药品恢复。

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