摘要： 构建了具有不同运行方式的两级垂直流人工湿地。连续运行1 a的结果表明：潮汐-连续流组合人工湿地能够有效地净化污染河水，其对COD、BOD5、SS、TP、TN、NH₃-N的年平均去除率分别为85.6%、94.7%、98.7%、85.6%、74.1%、87.7%；采用间歇（潮汐）运行方式的一级垂直流人工湿地不仅能够实现对COD、BOD5、SS 90%左右的去除，而且还能够促进二级连续垂直流人工湿地对NH₃-N、溶解态TP的有效去除；前置潮汐流湿地同二级连续流人工湿地相比，前者更利于植物的生长，在连续和间歇运行的垂直流人工湿地中植物对氮去除的贡献均高于对磷去除的贡献。

关键词: 人工湿地, 垂直流, 运行方式, 植物作用

Abstract: The two-stage vertical flow constructed wetland(CW)with different operation modes has been constructed. The results of a one-year continuous operation indicates that the tidal-continuous flow combined CW can effectively purify polluted river water. The average annual removing rates of COD,BOD5,SS,TP,TN and NH₃-N by this method are 85.6%,94.7%,98.7%,85.6%,74.1% and 87.7%,respectively. The first-stage vertical flow constructed wetland (VFCW)in intermittent operation mode(tidal mode)could not only remove about 90% of COD,BOD5 and SS,but also facilitate the effective removing effect on NH₃-N and dissolved TP in the second-stage continuous vertical flow constructed wetland. The comparison between the preposed tidal flow wetland and the second-stage continuous flow CW shows that the second-stage continuous flow CW is more suitable for the growth of plants. In the continuous and intermittent operations of VFCW,plants have higher contribution to nitrogen removal than the contribution to phosphorus removal.

Key words: constructed wetland, vertical flow, operation mode, plant function

中图分类号: 

• X703