模拟人工湿地系统净化生活污水研究

以无植物、沸石和石灰石1：1体积混合为基质的模拟人工湿地系统为对照，研究了美人蕉与富贵竹在不同种植方式及3组反应停留时间下对生活污水中污染物的净化效果。结果表明，不同类型湿地在72h停留时间下具有更好的脱氮除磷效果，而COD的去除效果则在48h停留时间下较为稳定，24h停留时间下各个湿地的处理效果均不理想。不同植物对脱氮除磷的效果差异较大，但各个湿地的COD去除效率在相同停留时间下差别不大。关人蕉湿地的脱氮除磷效率在3个停留时间下均优于其他湿地。美人蕉和富瓷竹混合种植体系对生活污水的净化效果与美人蕉单一种植体系差异不明显，美人蕉湿地表现出更稳定的处理效果。

Study on Domestic Sewage Purification by Simulation Constructed Wetland System

In order to investigate the purification effect of pollutants in domestic sewage with Canna indica and Dracaena sanderiana in different planting patterns and under three groups of retention time,the simulation constructed wetland system were built with 1∶1 volume mixture of zeolite and limestone as the substrates and one without plant as the control.The results showed that different types of wetlands in 72 h retention time had better effect in removing nitrogen and phosphorus,while the removal efficiency of COD was more stable under 48h retention time and the treatment effect of various types of wetland were all not good in 24 h retention time.Effect of different plants on the nitrogen and phosphorus removal differed very large,but the difference of the removal efficiency of COD for the various types of wetlands in the same retention time was not obvious.The nitrogen and phosphorus removal effect by Canna indica wetland was all better than other wetlands under three groups of retention time.The difference between the domestic sewage purification effect by mix cultivate system about Canna indica and Dracaena sanderiana and that by single cultivate system of Canna indica was not notable,and Canna indica wetland held a more stable treatment effect.