聚合氯化铝与聚磷硫酸铁絮凝除藻比较研究

针对武汉市莲花湖湖水,采用聚合氯化铝(PAC)和聚磷硫酸铁(PPFS)进行絮凝实验,比较了两种无机絮凝剂的絮凝效果及原水处理前后藻类群落变化。主要结论如下:①PPFS与PAC的最佳投加量分别为1.5mg/L、2.0mg/L;②PPFS在去除藻类细胞、浊度和色度方面均优于PAC,当PPFS投加过量时,因水体中Fe3+过量分布,使水样色度去除率下降;③PPFS絮凝处理微囊藻为主体的水华原水时,其效果比PAC更好。本文研究后表明:PPFS是一种新型高效絮凝剂,其絮凝性能明显优于PAC,当水体以微型藻类为主时,可使用PPFS以替代PAC,能提高絮凝效果。

Comparison Research on Coagulating to Remove Algae by Polymeric Aluminum Chlorid and Polymeric Phosphate Ferric Sulfate

With the water samples from Lianhua Lake,beaker test was carried out to compare the coagulation efficiency of the two inorganic coagulants,Polymeric Aluminum Chloride(PAC)and Polymeric Phosphate Ferric Sulfate(PPFS),and the change of the algae community in the raw water before and after the treatment was compared.The main conclusions are as follows: ①The best capacity of PPFS and PAC is 1.5ml、2.0ml respectively;②PPFS is superior to PAC in removing algae cell、turbidity and colority,while added PFFS excessively, the colority removal ratio reduces because of redundant Fe3+ in water;③PPFS is better than PAC in removing micro-algae(Microcystis Kutz.)from the raw water.According to experiment results,this paper shows that PPFS is a new effective coagulant,and its coagulation effect is better than PAC evidently;while micro-algae dominate in water,it can make improvement in algae removal operation by use PPFS instead of PAC.