投料倒置A/A/O脱氮除磷工艺中试

采用投料倒置A／A／O脱氮除磷工艺在上海某城市污水厂进行了中试，着重考察了在水力停留时间为8h和较短污泥龄条件下的脱氮除磷效果。结果表明，缩短泥龄总体上有利于提高除磷效果，且不会影响硝化效果。在泥龄为6d时，出水NH，-N平均为2、0mg／L，NO3^-N为4．3mg／L，PO4^3-P为0．5mg／L；而在泥龄为4d时，平均出水NH3-N仅为2．7mg／L，去除率达到92．3％。

Inverted A/A/O Process with Carrier Added for Nitrogen and Phosphorus Removal

Pilot-scale test was conducted on the suspended carrier-added inverted A/A/O process for nitrogen and phosphorus removal in a municipal wastewater treatment plant in Shanghai,and the removal efficiency was investigated under the conditions of HRT 8 h and shorter SRT.The result proves that the reduced SRT is advantageous to improving the removal efficiency of phosphorus and will not affect the nitrification effect.At SRT of 6 d,the effluent NH_3-N is 2.0 mg/L in average,with NO~-_3-N and PO~(3-)_4-P concentration of 4.3 mg/L and 0.5 mg/L respectively;while at SRT of 4 d,the effluent NH_3-N is only 2.7 mg/L in average and the removal rate reaches 92.3%.