新型复配铁盐在污水深度处理中的应用

Application of Compound Ferric Salt to Advanced Treatment of Municipal Wastewater

分别采用PAC和复配铁盐去除某污水处理厂二沉池出水中的COD,考察了两种药剂去除COD的效果。结果显示,投加PAC和复配铁盐对COD都有一定的去除效果,但当PAC投加量超过一定值时,过量投加不再起任何作用;复配铁盐对COD的去除率随着投加量的增加而升高,但过量投加会造成污水pH值降低,所以实际应用中,需要选择合适的投加量。

PAC and compound ferric salt were used to remove COD from the secondary effluent of a WWTP respectively, and the removal efficiency of COD was investigated. The results showed that PAC and compound ferric salt could both remove COD effectively. When PAC dosage exceeded a certain val- ue, there was no additional effect. The removal rate of COD could be increased with increase in dosage of compound ferric salt, while pH would be decreased with excessive dosage of compound ferric salt. So, the reasonable dosage should be chosen in the actual application.