正渗透膜浓缩生活污水效果及膜过程特性  

Membrane Process and Performance of Forward Osmosis for Concentrating Synthetic Sewage

作　　者：方舟[1] 高悦[1] 梁鹏[1] 张潇源[1] 黄霞[1] 

机构地区：[1]清华大学环境学院环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《中国给水排水》2015年第5期40-44,共5页China Water & Wastewater

基　　金：科技部国际合作项目(2013DFG92240);教育部长江学者创新团队发展计划项目(IRT1152)

摘　　要：针对低浓度模拟生活污水,构建了正渗透膜污水浓缩系统,并开展了对污染物和其他离子的截留和浓缩效果试验和膜过程特性研究。在体积浓缩至10倍的过程中,膜对污水中的有机物和营养元素具有良好的截留和浓缩效果。随着驱动液浓度的上升,正渗透膜水通量逐渐增加,膜污染发展速度也变快。在错流流速大于一定程度后,膜水通量受错流流速的影响不明显。正渗透膜具有较轻的膜污染潜势,可通过清洗手段实现超过96%的通量恢复。A forward osmosis （FO） membrane system was constructed to concentrate low strength synthetic sewage. The performance of rejecting and concentrating organic pollutants and nutrients, and the membrane process were investigated. The results showed that organic pollutants and nutrients were well rejected and concentrated by FO membrane during the volume of sewage being concentrated up to 10 times. Water flux of FO membrane increased with the increase of driven solution concentration, while membrane fouling grew faster. Meanwhile, when the crossflow rate reached to a certain level, the mem- brane flux was not significantly influenced by the change of crossflow rate. The FO membrane process showed less fouling potential, and 96% of the membrane flux could be recovered by physical and chemical cleaning.

关 键 词：正渗透 生活污水 浓缩 膜过程 

分 类 号：X799.3[环境科学与工程—环境工程]