酸化-混凝处理高浓度聚丙烯酰胺生产废水

Treatment of High Concentration Wastewater in Polyacrylamide Production by Acidification and Coagulation Process

采用酸化-混凝法处理高浓度聚丙烯酰胺(PAM)生产废水。聚合氯化铝(PAC)、聚合氯化铝铁(PAFC)、聚合硫酸铁(PFS)和三氯化铁(FeCl_(3))作为混凝剂,不同电性的聚丙烯酰胺作为絮凝剂,以COD去除率作为评价参数,在不同pH条件下对PAM废水进行混凝处理。结果表明PAC与Kemira阳离子絮凝剂配合使用效果最好。最佳工艺条件如下:废水pH 6.5,PAC投加量200 mg/L,Kemira阳离子絮凝剂A或B投加量为1 mg/L,在此条件下废水COD去除率达到83.2%以上,TDS去除率达到36.8%左右。该方法操作简便、能耗低、去除效果好。

High concentration wastewater in polyacrylamide(PAM)production was treated by acidification and coagulation process.Under different pH conditions,polyaluminum chloride(PAC),polyaluminum ferric chloride(PAFC),polymeric ferric sulfate(PFS)and ferric chloride(FeCl_(3))were used as coagulants,polyacrylamides with different electrical properties were used as coagulants,and the removal rate of COD was used as an evaluation parameter to treat PAM wastewater.The results showed that PAC combined with Kemira cationic flocculants had the best efficiency.The optimum treatment conditions were as follows:wastewater pH was 6.5,PAC dosage was 200 mg/L,Kemira cationic flocculants A or B dosage was 1 mg/L.Under these conditions,COD removal efficiency was more than 83.2% and TDS removal efficiency was about 36.8%.The method had the advantages of simple operation,low energy consumption and good removal effect.