Application of Polyelectrolyte in Turbidity Removal from Surface Water | Science Publications

American Journal of Applied Sciences

M. Razavi¹  A. H. Mahvi¹ 

关键词: Polyelectrolyte;    Turbidity;    Surface Water;   

DOI  :  10.3844/ajassp.2005.397.399

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

One of the most important treatment processes in surface water treatment plants iscoagulation. Surface waters such as rivers and lakes contain suspended particles and turbidity. With theaid of coagulants, and by flocculation process, followed by sedimentation and filtration, theseimpurities can be removed from raw waters these days, besides conventional chemicals such as Alumand Ferric chloride, polymers are getting common. Polymers can be used as pretreatment and filteraids chemicals, also. There are some advantages in the usage of polymers, such as; highersedimentation rate, lower price, better finished water quality, lower sludge volume produced, and abetter sludge quality with respect to mineral coagulants. Of course some disadvantages are related tothe polymers such as the monomers and residues in finished water which may be a health hazard. Inthis research, four different polymers for turbidity removal from raw waters were investigated. Rawwater with turbidities of 200, 500, 700 and 1000 FTU were treated with optimum polymer dosage. Theresults showed that, polymers with small dosage can be used for water purification. In this regard itwas found that Magnafloc LT27 has lowest dosage and better floc strength with respect to others.

【 授权许可】

Unknown