双膜法在瑞源水厂处理氟化物和硫酸盐中的应用

武城县瑞源水厂以南水北调东段末端调蓄水库大屯水库为水源,原水中氟化物和硫酸盐超标,采用常规处理+臭氧-活性炭工艺并不能去除氟化物和硫酸盐,此次水厂升级改造采用超滤-反渗透双膜法对活性炭滤池出水进行深度处理。膜车间出水与活性炭池出水以1∶2勾兑后,氟化物浓度≤1 mg/L,硫酸盐浓度≤250 mg/L,水质达标,运行稳定。通过对工艺设计参数及运行效果现状分析,总结了双膜法在工艺设计及水厂运行方面的经验,建议工程设计处理氟化物和硫酸盐时采用双膜法,运行时加强数据监控,及时进行清洗护理工作,以延长膜组件使用寿命,降低水厂运行成本。

Application of Dual Membrane Process in Fluoride and Sulfate Removal in Ruiyuan Water Treatment Plant

The Datun Reservoir at the end of the east section of South-to-North Water Transfer Project,is water source for the Ruiyuan Water Treatment Plant,Wucheng County.Excessive fluoride and sulfate in raw water cannot be removed using conventional treatment+Ozone-Activated carbon process.Ultrafiltration-reverse osmosis(UF/RO)dual membrane process is used to treat the effluent of activated carbon filter.After mixing the effluent from membrane workshop and activated carbon pool at 1∶2,the water quality is up to the standard with fluoride concentration≤1 mg/L and sulfate concentration≤250 mg/L.Through the analysis on process design parameters and running effect,the experience of double membrane method in process design and operation of water plant is summarized.It is suggested that double membrane process should be adopted in engineering design to deal with fluoride and sulfate,strengthen data monitoring during operation,and carry out cleaning and nursing in time,so as to prolong the service life of membrane module and reduce the operation cost of water plant.