混凝沉淀-垂直流人工湿地系统处理重污染河水

TREATMENT OF HEAVILY-POLLUTED RIVER WATER BY COMBINED SYSTEM OF COAGULATION-SEDIMENTATION AND VERTICAL FLOW CONSTRUCTED WETLAND

将混凝沉淀-垂直流人工湿地组合工艺用于处理重污染河水,简要介绍了工艺流程和设计参数,并对稳定期的运行数据进行了分析和讨论。连续十个月的水质监测结果表明,系统对重污染河水的净化效果显著,COD、BOD5、NH4+-N和TP的平均去除率分别为77.9%、79.4%、72.7%和83.8%。垂直流人工湿地对上述污染物均具有显著的去处效果,平均去除率均在50%以上;混凝沉淀对有机物和TP的去除效果较为理想,其中TP的平均去除率达到64.4%,但对NH4+-N的去除效果不显著,平均去除率不到10%。

The integrated processes of coagulation-sedimentation and vertical flow constructed wetland （VFCW） were applied to treat heavily-polluted river water. With a brief introduction to the technical process and design parameters, the operation data over steady periods were analyzed and discussed. The monitoring results of water quality over continuous ten months suggested that remarkable removal effects for heavily-polluted river water had been obtained within the combined system, with average removal rates of 77.9%, 79.4%, 72.7% and 83.8% for COD, BODs, NH4^＋-N and TP, respectively. Furthermore, VFCW exhibited obvious removal effects for all the pollutants above-mentioned and the average removal rate more than 50% for each. While coagulation-sedimentation process showed great removal effects for organic pollutants and TP. The average removal rate for TP as high as 64.4%, but the removal effect for NH4^＋-N （〈10%） was not remarkable.