PAC/PAM强化混凝沉淀法处理校园屋面雨水的研究

采用聚合氯化铝(PAC)/阳离子型聚丙烯酰胺(PAM)强化混凝沉淀法对校园屋面雨水处理进行了实验研 究，考察了PAC、PAM投加量、pH、搅拌速度及搅拌时间水力条件对COD、浊度去除率的影响.结果表明： 混合搅拌强度300r/min快速搅拌1min，100r/min中速搅拌2min，60r/min慢速搅拌5min的条件下，PAC的最 佳投加量为60mg/L，PAM的最佳投加量1mg/L；原水样pH在6-7的浊度去除效率达到93.5%，COD去除率达 到63%以上.
Enhancedcoagulationprecipitationmethodontreatingtheroofrainwaterofcampususingpolyaluminum chloride(PAC)/cationicpolyacrylamide(PAM)wasstudied.TheeffectsofPAC,PAMdosage,pH,hydraulicconditions suchasstirringspeedandstirringtimeontheremovalrateofCODandturbiditywereinvestigated.Theresultshowsthat theoptimummixingdosageofPACis60mg/L,andtheoptimumdosageofPAMis1mg/L,whenthequicklystirring time is1min with mixing strength of 300r/min, quickly, medium stirring speed is2min with mixingstrengthof 100r/minand5minwithslowlystirringspeedat60r/min.Theremovalefficiencyofrawwaterturbidityreachedabout 93%andtheremovalrateofCODreached65%withpHinthe6-7.