富营养化水体的PMSO强化聚合氯化铝絮凝处理工艺

Process of PMSO Enhanced Polyaluminum Chloride Flocculation for Eutrophic Water Treatment

针对常规混凝药剂对含藻水体处理效率低的问题,本试验利用单过硫酸氢钾复合盐为主要成分的"水王子"(PMSO)强化聚合氯化铝(PAC)絮凝处理含藻水体,考察其对含藻水体中藻类和高锰酸钾指数(CODMn)的去除效果。结果表明,PMSO复配PAC能有效地提升絮凝过程对藻和CODMn的去除效能。当PAC的投加量为30 mg/L、PMSO投加量从2 mg/L增加到15 mg/L时,絮凝过程对CODMn的去除率从23.4%增加到40.2%,藻的去除率从37.0%增加到98.0%;PMSO投加量的增加能够有效地提高絮凝过程对藻类和CODMn的去除效率;当原水中藻浓度增高时,藻和CODMn的去除率随之下降。PMSO与PAC总投加量一定,其复配比为1:2时,对藻和CODMn的去除效率最高。

Usually,algae cannot be effectively removed by conventional coagulation reagent.Potassium monopersulfate,which as the main component of"water-princess"(PMSO),was employed to enhance polyaluminum chloride(PAC)flocculation treatment of algae containing water in the study.The removal efficiency of algae and organic matter was investigated.Results showed that the removal efficiency of algae and chemical oxygen demand(CODMn)could be effectively improved with the PMSO and PAC concentrations.When the dosage of PAC was 30 mg/L,the removal rates of CODMn and algae increased from 23.4%and 37.0%to 40.2%and 98.0%,respectively,with the dosage of PMSO increased from 2 mg/L to 15 mg/L.Whereas,the removal efficiency of algae and chemical oxygen demand(CODMn)would be decreased when the algae concentration increased.The highest removal rates of CODMn and algae occurred when the mass concentration ratio of PMSO and PAC was 1:2,in condition that the total dosage of PMSO and PAC was constant.