奉贤某给水厂平流式浓缩池上清液絮凝剂的优选:小试和中试
Flocculant Selection of Supernatant from Advection Concentrated Tank of a WTP:Laboratory and Pilot Scale Tests
王春1
作者信息
- 1. 上海市自来水奉贤有限公司,上海 201400
- 折叠
摘要
当前奉贤第一水厂采用聚丙烯酰胺(PAM)作为平流浓缩池上清液助凝剂,根据上海供水团体标准的规定,PAM的使用限制了平流浓缩池上清液的回用.研究探索了硫酸铝和聚合氯化铝两种无机助凝剂替代PAM的可行性,通过小试和中试对比了3种助凝剂对奉贤第一水厂平流式浓缩池上清液的絮体沉降速率和出水水质的影响.结果表明,硫酸铝和聚合氯化铝处理的絮体沉降速率仅次于PAM,出水水质更优.中试结果表明,秋季应用硫酸铝以及冬季应用聚合氯化铝,在此规模上具有较好的混凝效果.经济性分析结果表明,使用硫酸铝和聚合氯化铝成本更低.因此,这两种无机助凝剂具有替代PAM的可行性.
Abstract
Currently,Fengxian No.1 Water Treatment Plant(WTP)adopts polyacrylamide as coagulant aid for supernatant from advection concentrated tank,and the use of polyacrylamide restricts the reuse of the supernatant from advection concentrated tank according to the regulations of Shanghai Water Supply Group Standard.In this study,it is explored the feasibility of replacing polyacrylamide with two inorganic coagulants,aluminium sulphate and polymeric aluminium chloride,and compared the effects of the three coagulants on the floc sedimentation rate and finished water quality of the supernatant from advection concentrated tank of Fengxian No.1 WTP through a small test and a pilot test.The results show that the flocculation rate of aluminium sulphate and polymeric aluminium chloride treatment is second only to polyacrylamide,and the finished water quality is better.The pilot test results show that the application of aluminum sulfate in autumn and polyaluminum chloride in winter has a good coagulation effect on this scale.The results of economic analysis show that the cost of using aluminium sulphate and polymeric aluminium chloride is lower.Therefore,these two inorganic coagulants have the feasibility of replacing polyacrylamide.
关键词
排泥水/PAM/无机助凝剂/上清液/回用Key words
sludge water/PAM/inorganic coagulant/supernatant/reuse引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据