芦苇湿地生态处理城市生活污水效果分析

选择两块生长相对均匀的芦苇湿地样地作为研究对象,研究芦苇湿地对城市污水中生物需氧量(BOD)、总悬浮物(S-S)、总氮(T-N)、总磷(T-P)的去除效果以及芦苇湿地在城市污水中的响应关系。结果表明:芦苇湿地加污水处理剂对城市污水净化效果较好,BOD、S-S、T-N和T-P去除率分别可达95.2%、92.1%、69.8%和57.6%。通过显著性分析发现,芦苇湿地是否加污水处理剂与城市污水中BOD、S-S、T-N和T-P去除率之间存在显著差异。芦苇湿地生态处理污水中的BOD和S-S的去除作用较强,对T-N和T-P的去除效果相对较弱。芦苇湿地处理城市污水,对芦苇生长无不良影响,而且污水为芦苇生长提供了良好的肥源,使芦苇盖度比对照增加16.8%～18.3%,高度比对照增加20.0～24.1cm,生物量比对照增加315.0～411.2g。

An Analysis of Ecological Treatment of Urban Sewage by Reeds Wetland

Two reeds wetland with relatively uniform growth were studied by investigating the effects of removal of biological oxygen demand(BOD),total suspended solids(SS),total nitrogen(T-N) and total phosphorus(T-P) by the reeds wetland and the responses of reeds wetland to disposed urban sewage.Results showed that:reeds wetland plus sewage treatment agents achieved better results of purification of urban sewage,the rate of removal of BOD,total S-S,T-N and T-P reached 95.2%,92.1%,69.8% and 57.6%.Significant differences were found between with and without addition of sewage treatment agents in the removal rates of BOD,S-S,T-N and T-P in urban sewage.Reeds wetland has a stronger effect on removing BOD and S-S,a weaker effect on T-N and T-P.Results indicated that the ecological treatment of urban sewage had no negative influence on the growth of reeds.The sewage provides nutrients to the reeds,leading to an increase of reed coverage by 16.8-18.3%,height by 20.0-24.1 cm,biomass by 315.0-411.2 g compared to the control.