跨膜压差和膜面流速对磁絮凝延缓陶瓷微滤膜通量衰减的影响  

EFFECT OF TRANSMEMBRANE PRESSURE AND CROSSFLOW VELOCITY ON MEMBRANE FOULING USING MAGNETIC FLOCCULATION PRETREATMENT

作　　者：周振[1] 姚吉伦[2] 庞治邦 刘波 张星[1] 

机构地区：[1]后勤工程学院国防建筑规划与环境工程系 [2]后勤工程学院国家救灾应急装备工程技术研究中心 [3]92303部队 [4]77620部队

出　　处：《环境工程》2017年第6期10-14,共5页Environmental Engineering

基　　金：国家科技支撑计划(2012BAK05B00)

摘　　要：为克服陶瓷微滤膜净化微污染水体时产水量不高、通量衰减迅速的难题,采用磁絮凝预处理工艺延缓陶瓷膜的污染。对比了磁絮凝预处理与传统絮凝预处理对陶瓷微滤膜膜污染的影响,结果显示:磁絮凝预处理后陶瓷膜的稳定产水量高于传统絮凝预处理,验证了磁絮凝预处理工艺延缓膜污染的可行性。同时,研究了跨膜压差和膜面流速对2种组合工艺膜通量的影响,结果表明:随着跨膜压差和膜面流速的增加,膜通量均提高但增幅逐渐放缓,其优化运行参数如下:跨膜压差为0.20 MPa,膜面流速为2.0 m/s。To increase membrane fluxes during micro-polluted surface water microfiltration process, magnetic flocculation （MF） was employed for ceramic membrane microfiltration （CMM） pretreatment to mitigate membrane fouling. Comparison of CMM performance with conventional flocculation （CF） and magnetic flocculation （MF） was conducted. The results showed that magnetic floeculation pretreatment improved water yield compared with conventional flocculation （CF） pretreatment. Meanwhile, factors such as transmembrane pressure and crossflow velocity that affected the permeate fluxes in hybrid MF-CMM process was investigated. The result indicated that the membrane fluxes was increased but the growth rate slowed with the increase of the transmembrane pressure and erossflow velocity, and the optimum operating conditions were a transmembrane pressure of 0.20 MPa and a crossflow velocity of 2.0 m/s.

关 键 词：磁絮凝 传统絮凝 陶瓷微滤膜 跨膜压差 膜面流速 膜通量 膜污染 

分 类 号：X52[环境科学与工程—环境工程]