中文摘要：

采用中试规模的缺氧生物滤池对污水厂的二沉池出水进行深度处理，重点考察了不同水力负荷下的脱氮效果。结果表明，缺氧生物滤池对水力负荷有一定的承受能力，当水力负荷≤4．3m3／（m2·h）时，滤池对TN的去除率可达到90％以上；当水力负荷增至5．4m3／（m2·h）时，滤池亦能在滤层高度为1．4m处将TN降至5mg／L以下，平均去除率为84％。当水力负荷较小时，脱氮过程主要发生在滤层前段，随着水力负荷的增大，滤层利用率逐渐升高。

英文摘要：

A pilot-scale anoxic biofilter was used for the advanced treatment of secondary effluent from WWTP. The denitrification efficiency at different hydraulic loading rates was investigated. The re- sult showed that the biofflter could operate at different hydraulic loading rates. When the hydraulic load- ing rate was equal to or less than 4.3 ma/（m2 ·h） , the removal rate of TN was more than 90%. When the hydraulic loading rate was increased to 5.4 m3/（ m2·h） , the TN decreased to less than 5 mg/L at the filter layer of 1.4 m, and the average removal rate was 84%. With low hydraulic loading rate, deni- trification occurred mainly in the front part of the filter. Increasing the hydraulic loading rate increased the utilization of the filter layer.