污染负荷对人工湿地污染处理效果的影响

研究了污染负荷对抚仙湖北岸典型人工湿地净化河道污水处理效率的影响。结果表明:随着湿地的运行,各项污染物去除效率均呈现下降趋势。TN、TP去除率基本上是随着进水浓度的上升而逐渐下降,而CODCr、SS去除率基本上是随着进水浓度的下降而逐渐下降。如果不考虑其它因素,仅从系统处理效果的角度选择污染负荷,人工湿地系统的最佳污染负荷为:TN 1.0～10mg/L,TP 0.6mg/L以下,NH3-N 3.0mg/L以下,CODMn 15～20 mg/L,CODCr 100～150mg/L,BOD5 20～70mg/L,SS 200～250mg/L。

Impact of Pollution Load on the Pollution Treatment Efficiency of the Artificial Wetland

This paper analyzes the impact of the pollution load on treating the wastewater in the fiver by a typical arti- ficial wetland located at the north of Fuxian Lake. The result shows that the removal rate of the various pollutants is gradually going down with the wetland＇ s operation. The removal rate of TN and TP is decreasing with the increasing influent concentration, while removing CODcr and SS in the wastewater is on the contrary. Leaving other factors a- side, the wetland treatment performance could be optimized when the pollution loads are ： TN 1.0 - 10mg/L, TP be- low 0. 6mg/L, NH3 - N below 3. 0mg/L, COD_Mn 15 - 20 mg/L, CODer 100 - 150mg/L, BOD5 20 - 70mg/L, SS 200 - 250mg/L.