Subsurface flow type constructed wetland system used for domestic sewage treatment has average removal rate of COD and TP above 85% and 80% respectively,and removal rate of total nitrogen about 55%.

• 潜流式人工复合生态床对生活污水中COD和TP的平均去除率分别为85%25和80%25以上,对总氮去除率为55%25左右。