人工湿地/渗透性反应墙工艺净化受污染河水研究

Combined Process of Constructed Wetland and Permeable Reactive Barrier for Purification of Polluted River Water

采用人工湿地/渗透性反应墙组合工艺(CW/PRB)和人工湿地(CW)处理受污染河水,考察了两者对COD、TN、TP等污染物的去除效果,分析了PRB的强化作用及其机理。结果表明,CW/PRB对COD、TN、TP的平均去除率分别为55.09%、42.15%、82.91%,与CW系统相比,去除率分别提高了34.29%、31.61%和65.85%。可见,CW/PRB弥补了CW对氮、磷去除效果欠佳的不足,提高了对污染河水的净化效果。

The combined process of constructed wetland and permeable reactive barrier （CW! PRB ） and constructed wetland （CW） were respectively used to treat polluted river water, the removal ef- ficiencies of pollutants like COD, TN and TP were investigated, and the enhanced effect and mechanism of PRB were analyzed. The results showed that the removal rates of COD , TN and TP by the CW/PRB process were 55.09%, 42.15% and 82.91% respectively, which were increased by 34.29%, 31.61% and 65.85% respectively compared with the single CW. It was concluded that the CW/PRB process could make up for the deficiency of the single CW in removal of nitrogen and phosphorus and improve the purification efficiency of the polluted river water.