中文摘要：

利用连续流双污泥生物澄清反应器（BCR）反硝化除磷系统，以模拟城市生活污水为处理对象，研究双污泥系统对COD、NH4^＋-N、TN的去除效果及不同NO3^--N浓度对反硝化除磷的影响。试验结果表明：双污泥BCR反硝化除磷系统对COD、NH4^＋-N和TN具有良好的去除效果，平均去除率分别为83．22％、97．2％、75．47％。控制生物膜好氧硝化反应池中DO浓度为3、4、5mg／L，池内NO3^--N浓度分别达到22、30、38mg／L，TP的平均出水浓度分别为2．11、0．96、2．69mg／L。当硝化池中NO3^--N浓度为30mg／L时，系统的运行情况较好，出水TP的浓度相对较理想。

英文摘要：

The removal efficiency for COD, NH4^＋-N, TN and the effect about different concentrations of NO3^--N on denitri-fying dephosphatation was investigated by using a laboratory scale continuous flow two-sludge biological clarifying reactor （BCR） denitrifying phosphorus removal system. Results showed that the two-sludge BCR denitrifying phosphorus removal system has good removal effect on COD, NH4^＋-N and TN, with average removal rate of 83.22%, 97.2%, 75.47% respectively. When the DO of biofilm aerobic nitrification reactor was controlled as 3, 4, 5 mg/L, NO3^--N concentration reached up to 22, 30, 38 mg/L respectively, average effluent concentration of TP as 2.11, 0.96, 2.69 mg/L respectively. The system of operation is favorable with relatively ideal effluent concentration of TP when the concentration of NO3^--N in nitration pool is 30 mg/L.