菰草滤床净化模拟村落污水尾水的试验研究

Experimental Study on Latifolia Griseb Filter Bed for Purify of Simulated Effluent of Village Sewage

采用菰草（Latifolia griseb）滤床净化模拟村落污水尾水的实验表明，以污染物去除负荷最大值确定滤床的水力负荷为0．9m3／m2·d，此运行条件下水生植物滤床对TN、TP、COD。，的去除率分别为33．5％、39．2％、22．8％；以出水可达《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A排放标准确定水力负荷应不大于0．3m3／m2·d，此条件下TN、TP的去除率分别为52．2％、58．3％。菰草滤床适宜栽培水深为15～25cm。

Latifolia griseb filter bed was used for purify of simulated effluent of Village sewage. Results showed that the opti- mum hydraulic loading rate of Latifolia griseb filter bed was 0. 9 m3/m2 · d） and the optimum Planting depth was 15 ～ 25 era. Under the optimum operating coodition ,the removal rate of TN ,TP,CODcf was 33.5% ,39.2% and 22.8% respectively. One -class A permitted criteria of the discharge standard of pollutants for municipal wastewater（ GB 18918 -2002 ）is lower than 0. 3 m3/m2 · d. Under the condition, the removal rate of TN,TP was 52. 2% ,58.3% .