用粘土作助凝剂提高聚合氯化铝除藻效果的研究  

Enhancement of Alga Removal Efficiency by Polyaluminum Chloride Using Clay as Coagulant Aid

作　　者：罗岳平[1] 施周[1] 王仕汇[1] 李炳[1] 

机构地区：[1]湖南大学土木工程学院

出　　处：《中国给水排水》2007年第17期61-65,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50178029);教育部博士点基金资助项目(20030537370);国家科技部国际合作项目(2003DFB00002)

摘　　要：以小球藻(Chlorella vulgaris)为材料,研究了几种常用絮凝剂的除藻效果,并探讨将粘土用作助凝剂提高除藻效果的可行性。结果表明,聚合氯化铝(PAC)对小球藻的去除效果最好;投加粘土有助于改善絮凝体结构,提高其沉降性能;粘土类型、投加次序、用量等因素对处理效果的影响很大,实际应用时宜选用高岭土作助凝剂,且先于絮凝剂投加,其用量应通过烧杯混凝试验确定,以防止因投加过量而降低去除效果。Chlorella vulgaris was selected to study the effect of several typical flocculants on alga removal, and the feasibility of using clay as coagulant aid to improve the alga removal efficiency was discussed. The results indicate that among the tested flocculants, polyaluminum chloride （PAC） is the most effective in removal of Chlorella vulgaris. The addition of clay is helpful to improve the structure characteristics and sedimentation performance of floe. The clay types, addition sequence, dosage and other factors greatly influence the alga removal efficiency. In regards to application, Kaolin should be selected as coagulant aid and added before the flocculant. The dosage of the Kaolin should be determined by jar tests to prevent the decrease in the removal efficiency due to the excessive addition.

关 键 词：除藻 聚合氯化铝 助凝剂 粘土 

分 类 号：TU991.22[建筑科学—市政工程]