将自主研发的主动错流式膜分离设备应用于城镇生活污水A/A/O处理工艺，膜设备直接安装在曝气池，以程控旋转操作实现主动式错流过滤。实验结果表明，出水COD、NH4+-N浓度分别小于40mg/L和1.0mg/L，去除率分别达到了91.3%和98.0%，在污泥浓度高达16000mg/L的情况下，主动错流式膜设备通过膜表面与液体之间的剪切力和转动时产生的强力湍流，能有效防止滤饼层产生，显著延缓了膜污染的速度，膜设备显现出优异的防阻塞和抗污染能力，实验过程中，膜通量保持稳定，膜的操作压力增长趋势缓慢，化学清洗周期选择为80d，中间未进行任何的维护性清洗。操作能耗比传统的曝气运行方式节约60%。

An independent research on active cross-flow membrane separation equipment was used in anaerobic/anoxic/oxic process (A/A/O) to treat urban sewage. The membrane device was directly installed in the aeration tank, and it implemented active cross-flow filtration by programmed rotation operation. The experimental results demonstrated that the effluent COD and NH4+- N were below 40 mg/L and 1 mg/L. The removal rate of COD and NH4+- N were 91.3% and 98%, respectively. Cake layer could be prevented effectively because of fluid shear force on the membrane surface and powerful turbulence generated in the device rotation in the case of sludge concentration up to 16000 mg/L. The speed of membrane fouling was significantly slowed down, and membrane equipment showed excellent anti-blocking and anti-pollution ability. During the experiment, the membrane flux remained stable and the operating pressure of the membrane increased slowly. The chemical cleaning cycle was selected for 80 days without any maintenance cleaning. The operation energy consumption of the membrane equipment could reduce 60% than traditional aeration operation. 

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