PAC与PAM复合絮凝剂对湿地进水预处理试验

为考察无机高分子混凝剂聚合氯化铝(PAC)与有机高分子絮凝剂聚丙烯酰胺(PAM)复合絮凝剂对进水中主要污染物的去除效果,并找出最佳的投药量,进行了PAC与PAM复合絮凝剂对人工湿地进水预处理的效果研究。结果表明,PAC与PAM复合絮凝剂对污水中SS、TP、COD去除效果较好。在PAC最佳投加量为24mg/L、PAM为0.3 mg/L时,对河水和生活污水的SS去除率分别达到了65%、69%,对TP的去除率为41%、49%,对COD的去除率为36%、44%。湿地的年药剂费用为6.2万元。

Using PAC and PAM Composite Coagulant to Pretreat Constructed Wetlands Influent

In order to inspect the elimination effect of PAC and the PAM compound flocculant on the main pollutants in water and discovered the best medicinal dosage,the coagulation experiment of PAC and PAM composite coagulant on constructed artificial wetland influent was conducted.The result showed that the composite coagulant could improve removal of SS and TP as well as COD in constructed wetlands influent.The SS,TP and COD removal ratio were 65%,41% and 36% respectively with PAC dosage of 24 mg/L and PAM 0.3 mg/L to wetlands influent from small creek while they were 69%,49% and 44% for rural domestic waste water.The total coagulant cost was 62 thousand yuan per year.