聚合铝盐混凝剂混凝除藻机理与强化除藻措施  

The algae removal mechanism by polymerized aluminium salt coagulants and methods to improve algae removal

作　　者：雷国元[1] 张晓晴[1] 王丹鸶[1] 

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《水资源保护》2007年第5期50-54,共5页Water Resources Protection

基　　金：国家"十五"重点科技攻关项目(2002BA806B04)

摘　　要：针对微污染水处理中藻细胞的去除,研究聚合氯化铝形态分布对混凝除藻效率的影响。结果表明,混凝剂水解产物中,中等聚合物含量影响混凝过程中藻细胞去除率。中等聚合物含量越大,藻细胞去除率越高;在一定条件下,藻细胞去除率与中等聚合物含量线性相关,混凝出水中残铝含量与单体和低聚物含量线性相关。对聚合氯化铝,中等聚合物含量与碱化度线性相关。适量加聚磷酸根、硅酸根可以提高混凝除藻效率,并能显著降低混凝出水中残铝含量,所阐述的混凝除藻机理可以较好地解释实验现象。The effect of species distributions of poly-aluminum chloride（PAC） on algae removal efficiencies was studied aiming at removing algae cell in the treatment of micro-polluted raw water.The results show that the percentage of middling polymers in hydrolysate of coagulants influencs the algae removal efficiency,the more the percentage of middling polymers was,the more the efficiency was.The algae removal efficiency relates with percentage of middling polymers linearly,and residual aluminum concentration in the effluent of coagulation relates with the percentage of monomeric species and low polymers of coagulants linearly under given condition.The percentage of middling polymers relates with basicity linearly for PAC.The polymerization of phosphate and activated silicic acid with suitable amount may improve algae removal and decrease residual aluminum concentration in the effluent of coagulation notably.Above results provide new aspect for preparation of efficient coagulants aiming at algae removal.

关 键 词：微污染水 水处理 混凝剂 藻细胞 除藻机理 

分 类 号：TU991.2[建筑科学—市政工程]