潜流湿地去除污水处理厂二级出水的处理效果

摘要

Horizontal limestone subsurface wetland was applied to advanced remove secondary effluent from sewage treatment plant.Hydraulic loading was intermittent contrdled and a continuous water samplings,namely,samplings under hydraulic loadings were of 0.278,0.139 and 0.093 m/d,were selected.The results showed that the horizontal limestone subsurface flow constructed wetlands had better removal effects on CODcr,NH3-N,TN and TP,and 0.093 m/d was the best run hydraulic load.Moreover,the removal effect of the subsurface flow wetland on each pollutant increased with the decreasing of the hydraulic load.%采用水平-石灰石潜流湿地对污水处理厂二级出水进行深度处理研究.间歇控制水力负荷,选择连续进水后取样,即在水力负荷分别为0.278、0.139、0.093 m/d时取水,测定其去除效果.结果表明,水平-石灰石潜流湿地对污水中的CODcr、NH3-N、TN和TP的去除效果良好,确定了0.093 m/d为运行最佳水力负荷；该潜流湿地表现出了随着水力负荷的逐渐减小,其对各污染物的去除率逐渐提高的性质.