4种湿地植物对人工湿地净化生活污水的影响比较

发布时间：2018-08-03 18:48

【摘要】：不同类型人工湿地对生活污水的处理效果,受到许多因素的影响,其中不同植物类型的选择,可能会造成人工湿地对主要污染物COD、TN和TP的净化效果发生很大差异。研究了4种湿地植物(菖蒲、香蒲、千屈菜和水葱)在水平潜流、垂直上行流和下行流人工湿地中对人工合成的生活污水的处理效果和主要污染物(COD、TN和TP)去除率的季节变化,通过比较不同植物类型在不同湿地类型中对主要污染物的去除效果分析了可以达到最佳污水净化效果的启动条件。结果表明:香蒲在垂直下行流湿地去除有机污染物效果最好,去除率可达85.55%;水葱在垂直上行流湿地去除TN效果最好,去除率可达57.52%,香蒲在垂直上行流湿地去除TP效果最好,去除率可达84.28%。
[Abstract]:The effects of different types of constructed wetlands on the treatment of domestic sewage are affected by many factors, among which the selection of different plant types may lead to great differences in the purification efficiency of CODN TN and TP in constructed wetlands. The effects of four wetland plants (Acorus calamus, Typha cattails, Dioscorea chinensis and Allium nigra) on the treatment of synthetic domestic sewage and the seasonal change of the removal rate of main pollutants (CODN, TP) in the constructed wetland with horizontal subsurface flow, vertical upward flow and downflow were studied. By comparing the removal effects of main pollutants from different plant types in different wetland types, the start-up conditions for achieving the best sewage purification effect were analyzed. The results showed that the removal efficiency of organic pollutants was the best in the vertical downflow wetland, the removal rate was 85.55, the removal rate of TN was the best in the vertical upstream wetland, the removal rate was 57.52, and the TP removal efficiency was the best in the vertical upstream wetland. The removal rate can reach 84.28%.
【作者单位】：污染控制与资源化研究国家重点实验室南京大学环境学院;江苏省农村环境保护与生态修复工程中心;江苏省工程咨询中心;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07204-001)
【分类号】：X799.3

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