摘要
正向渗透是一项新型的利用半透膜两侧溶液渗透压差作为驱动力的膜分离技术。介绍了正向渗透膜分离技术的原理和工艺特征,对其在水处理领域(包括海水淡化、污水处理与再生回用、工业废水处理、垃圾渗滤液浓缩、污泥消解液处理等)的研究进展进行了综述。现有的研究表明,可用于正向渗透工艺的膜不同于常规的反渗透膜,需要从膜结构和削减膜污染的角度开发适合的膜组件;采用NH3和CO2制备提取液是目前研究中具有应用前途的方式之一,具有产水率高且易于分离浓缩的特点。
Forward osmosis （FO） is a novel membrane separation technique which utilizes osmotic pressure differential as the driving force. The mechanism and features of forward osmosis process are introduced. The research progress in seawater desalination, wastewater treatment and reuse, industrial wastewater treatment, landfill leachate concentration and digested sludge liquid treatment is also re- viewed. The research shows that FO membrane is different from RO membrane. Appropriate FO mem- brane should be developed by consideration of the membrane structure and the mechanism of membrane fouling. The process using ammonia and carbon dioxide to prepare draw solution is one of the most promising processes, because of the high water flux and being easily separated.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第14期38-41,46,共5页
China Water & Wastewater
关键词
正向渗透
水处理
膜结构
提取液
forward osmosis
water treatment
membrane structure
draw solution
