四种混凝剂复配处理造纸黑液的实验研究  

Experimental Study on the Treatment of Papermaking Black Liquor by the Complicating of Four Coagulants

作　　者：潘永江 荣少鹏[2,3] 孙亚兵[2,3] 张艳[2,3] 

机构地区：[1]江苏省淮安市金湖县环境保护局,江苏淮安211600 [2]污染控制与资源化国家重点实验室,南京210046 [3]南京大学环境学院,南京210046

出　　处：《河南科学》2013年第3期357-361,共5页Henan Science

基　　金：污染控制与资源化研究国家重点实验室开放课题(PCRRF10016)

摘　　要：通过单一混凝剂的最佳pH和最佳用量的混凝实验,对四种混凝剂逐级进行复配,并研究了在优选pH和pH不变两种情况下,复配混凝剂对造纸黑液的处理效果.实验表明:四种混凝剂的最佳复配比例为:硫酸铁∶硫酸铝∶聚氯化铝铁∶硫酸铝钾=1∶0.4∶1.4∶1.4(体积比),且优选pH为6.pH=6时,投加用量分别为硫酸铁、硫酸铝、聚氯化铝铁、硫酸铝钾=0.95 g/L、0.4 g/L、1.35 g/L、0.65 g/L的复配混凝剂溶液,CODcr和色度去除率分别为97.78%和97.74%.当黑液pH不变(即pH=7.8)时,CODcr和色度去除率均不大,说明pH对复配混凝剂的处理效果有较大的影响.In the experiment of flocculation-sedimentation,four kinds of coagulant were mixed gradually after optimization of pH and dosage flocculation experiments of a single coagulant. Besides,the effect of complex coagulant on the treatment of black liquor was studied under the premise of optimum pH and original pH. The results showed that the optimum mixture ratio of coagulants was 1 （Fe2 （SO4） 3） ： 0.4 （A12 （SO4） 3） ： 1.4 （PAFC） ： 1.4 （KAI （SO4）2）, and the preferred pH was 6. The CODer and Chroma removal rates were 97.78% and 97.74% respectively when pH value was 6 and dosage were Fe2 （SO4）3=0.95 g/L, A12（SO4）3=0.4 g/L, PAFC=l.35 g/L, KA1 （SO4）2=0.65 g/L. Under the premise of original pH, black liquor CODer and ehroma didn＇t change significantly. This showed that pH had a greater impact on the treatment effect of complex coagulant.

关 键 词：造纸黑液 复合混凝剂 污水处理 

分 类 号：X7[环境科学与工程—环境工程]