陶瓷膜处理地表水的工艺  

Purification of surface water by ceramic membrane

作　　者：张荟钦[1] 周利跃 刘飞[1,2] 李卫星[1] 邢卫红[1] 

机构地区：[1]南京工业大学膜科学技术研究所,江苏南京210009 [2]江苏久吾高科技股份有限公司,江苏南京210061

出　　处：《南京工业大学学报（自然科学版）》2011年第4期20-23,42,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21076102);国家高技术研究发展计划(863计划)资助项目(2009AA033005);江苏省自然科学基金资助项目(BK2008504);江苏省高校自然科学基金资助项目(10KJB530002)

摘　　要：采用混凝沉降与陶瓷膜超滤的组合工艺处理地表水,考察操作模式、膜孔径、膜构型以及膜通量等对膜过滤性能的影响。结果表明:在恒压操作下,终端过滤的操作压差应小于0.075 MPa,对于孔径大于50 nm的陶瓷膜而言,膜通量随孔径变化不大;错流过滤的膜通量随孔径增大而增大;错流过滤的渗透通量是终端过滤的1.5～2.2倍。恒通量操作下,蜂窝陶瓷膜过滤性能优于19通道陶瓷膜,并在恒通量150 L/(m2.h)下稳定运行。混凝沉降-陶瓷膜组合工艺对浊度的去除率大于99%,对吸收254 nm波长紫外线有机物(UV254)的去除率大于47.7%,产品水的部分指标优于GB 5749—2006中的指标。Surface water was purified by the combined process of coagulation-sedimentation and ceramic membrane.The effects of operation mode,membrane pore size,membrane configuration,and flux were investigated.For dead-end mode with constant trans-membrane pressure（Δp）,Δp was controlled below 0.075 MPa and the pseudo-steady flux of membranes with pore size had little difference when the pore size was larger than 50 nm.For cross-flow filtration,pseudo-steady flux increased with the pore size of membrane.The pseudo-steady flux of cross-flow filtration was 1.5~2.2 times of that for dead-end filtration.In constant flux mode,the filtration performance of honeycomb ceramic membrane was better than that of 19-channel ceramic membrane.The system run stably with a permeate flux of 150 L/（m2·h）,and could remove more than 99% of turbidity and 47.7% of organic compounds absorbing 254 nm wavelength ultraviolet（UV254）.The quality of permeate was superior to that specified in GB 5749—2006.

关 键 词：陶瓷膜 地表水 膜构型 操作模式 

分 类 号：TQ028.8[化学工程]