Purification Effect of Constructed Wetlands for Trea- ting River Water Flowing from Phosphate Mine Areas into Fuxian Lake

摘要

[Objective]The study aimed at discussing the purification effect of constructed wetlands for treating river water flowing from phosphate mine areas into Fuxian Lake. [Method] The running parameters of the constructed wetlands were investigated for one year,and the purification effect of the constructed wetlands for treating the sewage from phosphate mine areas was analyzed. [Result]With the aid of the constructed wetland,the average removal rates of total nitrogen ( TN) ,total phosphorus ( TP) and CODCr were 52%,32% and 54%,and the removal effects were best when the designed hydraulic load was 0. 67 m3 /( m2 ·d) . Running stably for six years,the constructed wetlands had advantages of no power, low resistance and high removal rate. [Conclusion]The constructed wetlands reduced the load of pollutants from phosphate mine areas into Fuxian Lake effectively,which played important roles in the protection of water quality of Fuxian Lake.