中文摘要：

为了研究低溶解氧微膨胀状态下污染物的去除效果，采用SBR反应器，平均DO浓度为0．5—0．9mg／L，通过好氧／缺氧（O／A）的运行方式，对污染物处理效果进行研究。结果表明：低溶解氧丝状菌污泥微膨胀状态下，SVI可稳定控制在200mL／g左右，出水SS含量很低，COD去除率在80％以上，氨氮去除率90％以上，除磷效率在90％之上，出水水质良好，同时可以节约曝气量约46．7％。低溶解氧微膨胀状态下，可保证出水处理效果，污泥沉降性能影响小，同时可以节约动力费用。

英文摘要：

In order to investigate the pollutant removal effect with low DO and sludge micro-bulking, the sequence batch reactor （SBR） operated in aeration/anoxic （O/A） process with mean DO value 0.5 - 0.9 mg/L has been studied. The results showed that the effluent water quality was good with low SS value, the SVI could be controlled at 200 mL/g, and the removal rates of COD, ammonia and phosphorus could reach 80% , 90% and 90% , respectively. At the same time the aeration flow could be saved to 46. 7%. It is concluded that the activated sludge process with low DO and sludge micro-bulking could attain good wastewater effluent quality, exert little influence on sludge sedimentation performance, in the meanwhile the energy cost would be saved too.