聚氯化铝铁与聚丙烯酰胺协同处理城市污水研究

Study on the Treatment of Municipal Sewage by Polyaluminum Ferric Chloride Combined with Polyacrylamide

研究聚氯化铝铁(PAFC)对城市污水(浊度155 NTU,COD值209 mg/L)的絮凝特性,并探讨阳离子聚丙烯酰胺(CPAM)对PAFC助凝作用。结果表明,弱碱性、适当的投加量和搅拌时间有利于PAFC发挥良好的絮凝特性;CPAM具有一定的助凝作用,先加入CPAM(投加量82 mg/L),再加入聚氯化铝铁(投加量1 g/L)时,浊度和COD值降低率分别达99.35%和57.74%。

The lfocculability of polyaluminum ferric chloride（PAFC） to treat municipal sewage is studied, which has the turbidity of 155 NTU and COD of 209 mg/L. Cationic polyacrylamide（CPAM） is chosen to be coagulant. The results show that in the weakly alkaline condition, proper addition and some mixing time are good to the lfocculability of polyaluminum ferric chloride（PAFC）. Through adding cationic polyacrylamide（CPAM, 82 mg/L） and polyaluminum ferric chloride（PAFC, 1 g/L） in turn, the decrease ratio of turbidity and COD are 99.35% and 57.74% separately.