表面流湿地对低污染水处理的实际运用及效果评价

Practical Application and Effect Evaluation of Surface Flow Wetland for Low Pollution Water Treatment

龙川江干流青山嘴水库左岸建有6块表面流湿地,处理面源或部分河道来水。选取1号湿地,采用标准指数评价法分析湿地出水达标情况,并通过去除率分析湿地对TN、TP和NH_(3)-N的处理效果。评价结果表明,青山嘴表面流湿地对TN、TP和NH_(3)-N的处理率达到40%以上,COD、TP和NH_(3)-N单因子评价指数小于1,达到Ⅲ类水质标准;TN在旱季单因子评价指数大于1,TN是超标因子。

Six surface flow wetlands are built on the left bank of Qingshanzui Reservoir, which is located in the main stream of Longchuan River, to treat the water from non-point sources or part of the river. In this paper, the standard index evaluation method is used to analyze the effluent quality of No. 1 wetland, and the treatment effect of the wetland on TN, TP and NH_(3)-N is analyzed through the removal rate. The results showed that the treatment rate of TN, TP and NH_(3)-N in Qingshanzui Surface Flow Wetland reached more than 40%, and the single factor evaluation index of COD, TP and NH3-N was less than 1, reaching the Class III water quality standard. The single factor evaluation index of TN in dry season is greater than 1, and TN is the over standard factor.