人工湿地中不同水生植物对低污染水的净化效果研究

Purification Effects of Different Aquatic Plants on Low Polluted Water in Constructed Wetland

以太湖流域污水处理厂尾水为对象,筛选适合于低污染水生态净化的水生植物,通过构建人工湿地系统,研究了8种水生植物对氮、磷等水质指标的去除效果。结果表明:四季鸢尾和睡莲的综合净化效能最强,在高温季节,圆币草对TN、NO_(3)-N、TP的去除效果最佳,再力花对TN、TP的去除效果最差,花叶芦竹对NH_(3)-N、COD的去除效果最差;在低温季节,四季鸢尾对TN、NO_(3)-N、TP、COD的去除率最佳。研究成果可为太湖流域低污染水生态净化工程中水生植物的合理搭配提供基础。

The tail water of wastewater treatment plant in Taihu River Basin was selected as an object to select the aquatic plants suitable for the deep purification of low pollution water.Based on building the constructed wetland system,the removal efficiency of nitrogen and phosphorus in sewage treatment plant tail water was studied by different aquatic plants.The results showed that the comprehensive purification efficiency of Iris Quadrangularis and water lily is the strongest.In the high temperature season,the removal efficiency of Coingrass for TN,NO_(3)-N and TP is the best,the removal efficiency of Thalia dealbata Fraser for TN,TP is the worst,and the removal efficiency of Arundo donax‘Versicolor’for NH_(3)-N and COD is the worst.In low temperature season,the removal rate of Iris Quadrangularis for TN,NO_(3)-N,TP,COD was the best.The results provide a basis for the rational allocation of aquatic plants in the ecological purification of low-pollution water in the Tai Lake River Basin.