低压纳滤膜用于给水深度处理的中试研究  

Pilot-scale Test Study on Low-pressure Nanofiltration Membrane Applied in Drinking Water Advanced Treatment

作　　者：谢喜平 张佩瑶 杨运 李天玉[2] 陈亦力[2] 俞开昌[2] 姚家隆 郭莎莎 XIE Xi-ping;ZHANG Pei-yao;YANG Yun;LI Tian-yu;CHEN Yi-li;YU Kai-chang;YAO Jia-long;GUO Sha-sha(Taicang Water Group Co.Ltd.,Taicang 215400,China;Beijing Origin Water Technology Co.Ltd.,Beijing 102206,China)

机构地区：[1]太仓市水务集团有限公司,江苏太仓215400 [2]北京碧水源科技股份有限公司,北京102206

出　　处：《中国给水排水》2020年第17期30-35,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07201001)。

摘　　要：以长江流域某自来水厂沉淀池出水为研究对象,采用超低压纳滤膜对其进行深度处理。中试(设计规模为50 m^3/d)考察了碧水源DF膜系统对关键污染物的截留性能、最佳工艺参数。结果表明,在设计回收率85%条件下,DF膜系统对CODMn、总铝、总溶解性固体(TDS)和总硬度的截留率分别为(74.0±6.0)%、(96.8±2.4)%、(24.6±1.5)%和(30.5±2.7)%,对检出的15种痕量有机物平均截留率为92.4%。优化工艺参数后,在不添加阻垢剂的条件下,回收率可达90%,稳定运行通量为16~18 L/(m^2·h),化学清洗周期为3个月左右,DF膜系统的直接运行费用为0.247元/m^3,工艺绿色,产水率高,具有良好的经济性。Low-pressure nanofiltration membrane was used to treat effluent from a sedimentation tank of a drinking water plant in Yangtze River basin.Interception performance of the key pollutants and optimum operational parameters of a pilot-scale test DF membrane system(design scale of 50 m^3/d)were investigated.When the recovery rate was set to be 85%,interception rates of CODMn,total aluminum,TDS and total hardness were(74.0±6.0)%,(96.8±2.4)%,(24.6±1.5)%and(30.5±2.7)%,respectively,and the average interception rate of 15 kinds of trace organic compounds was 92.4%.After optimizing the process parameters,the recovery rate could reach to 90%with operation flux of 16-18 L/(m^2·h)and chemical cleaning cycle of three months without adding inhibitor.The operational cost was 0.247 yuan/m^3,indicating that the process was green and economy with high water recovery rate.

关 键 词：给水深度处理 低压纳滤膜 痕量有机物 截留率 

分 类 号：TU991[建筑科学—市政工程]