中文摘要：

为进一步提高佛山某污水厂（CASS工艺）出水水质使其达到中水回用标准，以该厂污水为对象进行中试规模研究，探讨回流比和回流方式对间歇式缺氧／好氧膜生物反应器（A／O—MBR）脱氮除磷的影响．结果表明：回流方式和回流比对间歇式A／O—MBR去除COD。和NH4-N效果无显著性影响，出水COD。，和NH4＋-N均达到《城镇污水处理厂污染物排放标准》（GBl8918--2002）一级A标准；回流比和回流方式对系统去除TN和TP的效果均有显著影响，连续回流且回流比较大（350％）时，系统对TN和TP的去除效果均较差；回流比为130％时，连续回流有利于系统对TN的去除，去除率可达（48．00±10．05）％，出水TN可达一级A标准；回流比为130％时，间歇回流更有利于系统对TP的去除，去除率可达（78．27±23．41）％，出水TP满足一级B标准．

英文摘要：

To enhance the quality of wastewater treatment plant＇ s （CASS process） effluent in Foshan to satisfy the water reuse standards, the impact of reflux ratios and reflux modes on nitrogen and phosphorus removal performance of a pilot scale of intermittent A/O-MBR fed with municipal wastewater was studied in this paper. The results showed that the reflux ratios and reflux modes had no remarkable influence on removal of CODcr and NH4＋ -N, and the concentrations of CODcr and NH4＋ -N in the effluent both reached the primary standard A of 〈 Discharge standard of pollutants for municipal wastewater treatment plant 〉 （ GB18918-- 2002）. The reflux ratios and reflux modes had significant influence on removal of TN and TP. The removal efficiencies of TN and TP were poor with a continuous reflux and a larger reflux ratio （ 350 % ） ; When the reflux ratio was 130 %, the continuous mode was propitious to TN removal, and the removal efficiency could reach （ 48.00 ＋ 10. 05 ） %, what＇ s more, the concentration of TN in the effluent reached the primary standard A, while the intermittent mode was also propitious to TP removal, the removal efficiency could reach （78.27 ＋23.41 ） %, and the concentration of TP in the effluent reached the primary standard B.