富营养景观水体中藻类和磷的去除试验  

Removal test of phosphate and algae from eutrophic landscape water by coagulation

作　　者：袁林江[1,2] 张伟[1,2] 孔海霞[3] 

机构地区：[1]西部建筑科技国家重点实验室(筹),陕西西安710055 [2]西安建筑科技大学环境与市政工程学院,陕西西安710055 [3]中国市政工程华北设计研究院西安分院,陕西西安710016

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第2期236-240,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：教育部重点科技项目(207118);陕西省自然科学基金项目(2007E201)

摘　　要：投加适当的混凝剂不但可以去除水中悬浮颗粒(包括藻类),也可以沉淀磷酸盐,但目前对于混凝法同时去除富营养化景观水体中藻类和磷尚缺乏系统研究.该课题采用精制硫酸铝(Al2(SO4)3.18H2O)和三氯化铁(FeCl3.6H2O)为混凝剂,考察了它们对富营养化景观水中磷和藻类的去除效果.采用正交试验确定了最佳反应时间、混凝剂投加量和pH值.试验结果表明,两种混凝剂单独使用均可有效去除水中藻类和磷酸盐.用FeCl3混凝除藻和除磷的最佳操作条件为混凝15min,pH值为8,混凝剂投加量为50mg/L.用Al2(SO4)3混凝除藻和除磷的最佳操作条件为混凝15min,pH值为8,混凝剂投加量为30mg/L.硫酸铝较三氯化铁更适合混凝沉淀去除富营养化景观水体中的藻和磷酸盐.Coagulation can remove not only suspended particles including algae but also phosphate theoretically, but research on removal of algae and phosphate simultaneously has not been carried out widely up by now. Aluminum sulfate and ferric chloride were used as coagulant agent, and their removal efficiency of phosphate and algae from landscape water was investigated in this study. Optimization of reaction time, chemical dosage and pH value were determined by orthogonal design. Results indicated that both aluminum sulfate and ferric chloride could remove algae and phosphorus effectively. Optical condition of the operation suggested that the reaction time was 15 min, pH8, and dosage of FeCls 50 mg/L. With Al2 （SO4）3 as coagulant it was 15 min, pH8, and 30 mg/L. Aluminum sulfate is more suitable for algae and phosphorus removal by coagulation than ferric chloride.

关 键 词：富营养化 景观水体 混凝沉淀 除磷 除藻 

分 类 号：X703.1[环境科学与工程—环境工程]