摘要
通过小试,比较了3个品种复合聚合氯化铝（PAC）对磷的去除效果,考察了混凝除磷与除浊的关系,同时观察水温、pH值对混凝除磷效果的影响以及混凝对水中不同形态磷的去除效果,在此基础上对PAC与聚丙烯酰胺（PAM）联用的除磷效果进行了研究.结果表明：3#PAC混凝除磷的效果最好;强化混凝可以有效提高给水除磷的效果;PAC混凝除磷的最佳pH值为7;水温升高有利于提高混凝除磷的效果;溶解性磷的去除更加困难,但是当混凝剂投量增加到一定程度,正磷酸盐也能得到有效去除;在混凝中速搅拌5 min后,投加PAM可达到更佳助凝除磷的效果,最佳投量为0.7 mg/L.
Effects of phosphorus removal by three kinds of composite polyaluminum chloride （PAC） in laboratory scale are compared in this article. Relations between phosphorus removal and turbidity removal by coagulation are investigated. Effects of water temperature and pH value to phosphorus removal are observed, and removal effects of various phosphorus formations by coagulation are reviewed. Effects of phosphorus removal are further studied by combined applications of PAC and polyacrylamide （PAM）. The results showed that the No. 3 PAC is the most effective one, and effects of phosphorus removal of drinking water treatment can be clearly improved by enhanced coagulation. The optimum pH value of phosphorus removal is 7. Effects of phosphorus removal can be improved by raising water temperature. In general, it is more difficult to remove dissolved phosphorus, but phosphate can be effectively removed by dosing more coagulant. The effects of phosphorus removal by coagulation aid can be achieved more effectively by adding PAM after five minutes medium rate mixing during coagulation, with the optimum dosage of 0.7 mg/L.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2006年第10期939-943,共5页
Journal of Beijing University of Technology
基金
国家'八六三'计划资助项目(2004AA601020)国家自然科学基金资助项目(50378004)中国博士后科学基金资助项目(2005038040).
关键词
除磷
强化混凝
复合聚合氯化铝
聚丙烯酰胺
给水处理
phosphorus removal
enhanced coagulation
composite polyaluminum chloride
polyacrylamide
drinking water treatment
