基于新型离子交换膜过程的含盐废水零排放技术

Emerging Ion Exchange Membrane Process-Based Zero Liquid Discharge Technology for Saline Wastewater

离子交换膜过程作为连续的离子交换过程,具有绿色、经济、可持续、无污染等优点。本文以近年来出现的新型离子交换膜过程的结构组成、分离机理等为出发点,结合含盐废水零排放过程面临的高能耗、易结垢、分盐难等关键问题,介绍了选择性电渗析、置换电渗析、反电渗析等新型离子交换膜过程在零排放领域的最新应用与研究进展;针对这些过程与其他分离技术的系统性集成操作进行了介绍与总结,并对其进行了初步分析和评述,以期为以后的研究工作提供参考。

As a continuous ion exchange process,ion exchange membrane(IEM)process has many advantages in terms of green,sustainability,cost and pollution free.The latest applications and current progress of emerging ion exchange membrane process-based zero liquid discharge(ZLD)technology for saline wastewater,such as selectrodialysis,electrodialysis metathesis and reverse electrodialysis,are summarized from the view of some elementary factors(configurations,working mechanism,etc.),by considering the key issues of ZLD process,i.e.,huge energy waste,easy scaling and difficult salts separating.The integrations with other separation technologies are introduced and summarized specifically.The review has made a generalization and summarization of the previous works in order to provide some reference for the future works in ZLD progress.