中文摘要：

针对污水处理厂目前普遍存在碳源不足和剩余污泥量过大的问题，以某小区低ρ（C）／ρ（N）比生活污水为研究对象，构建了多级好氧缺氧生物膜反应器，考察了反应器脱氮、污泥减量效果及运行工况．试验表明反应器最优运行工况：流量分配比为3：4：3，HRT为11h，ρ（DO）为4．0mg／L，温度为25℃，回流比R=1．0．在上述工况下，当进水ρ（TN）、ρ（NH4^＋-N）、ρ（COD）分别为80～130、75—100、260～400mg／L时，ρ（TN）出水约20mg／L，ρ（NH4^＋-N）、ρ（COD）出水分别降至5．0、30mg／L以下，TN、NH4^＋-N、COD平均去除率分别达到80％、95％、91％．多级好氧缺氧试验同时表明：反应器中的污泥产率仅为0．10，优于其他生物膜工艺，具有良好的污泥减量效果．

英文摘要：

In order to solve problems of insufficient carbon sources during biological denitrification and too much surplus sludge in wastewater treatment plant, a multi-aerobic-anoxic bio-film reactor was built to treat low ρ（C）/ρ（N） ratio wastewater in a community. The reactor could achieve its optimal results when flow distribution ratio was 3：4： 3, HRT was 11 h, ρ（DO） was 4.0 mg/L, temperature was at 25 ℃, and reflux ratio R=1.0. Under above conditions, whenρ（TN）,ρ（NH4-N） andρ（COD） in raw water was 80 - 130, 75 - 100 and 260 -400 mg/L, respectively, removal efficiency of TN, NH4^＋ -N and COD reached 80% ,95% and 91% , respectively, ρ（TN） in effluent was about 20 mg/L, ρ（NH4-N） and ρ（COD） in effluent was dropped to below 5.0 mg/L and 30 mg/L, respectively. The results also showed that the sludge production rate was only 0.10, which was superior to other bio-film processes. So the effect sludge reduction was significant.