电渗析集成技术在高盐废水处理中的应用研究进展

Research Progress on the Application of Integrated Electrodialysis Technology in High Salt Wastewater Treatment

随着高盐废水排放造成的资源流失及水环境问题的日益突出,不断提升的废水排放标准导致积极回收高盐废水中的有价资源,回用废水减少排放以降低对环境的危害成为必然趋势。为解决高盐废水处理难的问题,膜分离技术,尤其是电渗析(ED),由于对废水中的荷电离子分离、淡化和浓缩的能力,受到研究者的广泛的关注。然而使用单一电渗析技术处理高盐废水时,成本能耗过高,因此将ED技术与压力驱动的膜技术进行集成。这种方法实现了高效回收高盐废水中的有价资源的目标,并减少了向环境中排放的废水,成为了高盐废水处理的热门工艺。本文介绍了ED技术的基本原理和常用的几种电渗析模式,重点介绍了ED+压力驱动膜集成技术处理高盐废水的研究发展现状。最后结合了近年ED-膜技术集成工艺的发展,并对这些集成联用技术在高盐废水的资源化处理应用前景进行了展望,为未来高盐废水处理研究提供参考。

With the increasing prominence of resource loss and water environment problems caused by high-salt wastewater discharge,the rising wastewater discharge standards have led to the inevitable trend of actively recovering valuable resources from high-salt wastewater and reusing wastewater to reduce the discharge to reduce the environmental hazards.To solve the problem of difficult treatment of high-salt wastewater,membrane separation technologies,especially electrodialysis(ED),have received extensive attention from researchers due to it ability to separate,desalinate and concentrate charged ions in wastewater.However,the cost and energy consumption are too high when using a single electrodialysis technology to treat high-salt wastewater.So the ED technology is integrated with pressure-driven membrane technology.This approach has become a popular process for high-salt wastewater treatment by achieving the goal of efficiently recovering valuable resources from high-salt wastewater and reducing the discharge of wastewater into the environment.This paper introduces the basic principles of ED technology and several commonly used electrodialysis modes.It focuses on the current research and development status of ED+pressure-driven membrane integrated technology for the treatment of high-salt wastewater.Finally,the development of integrated ED-membrane technology processes in recent years is combined with the prospect of the application of these integrated combined technologies in the resource-based treatment of high-salt wastewater,which provides a reference for future research on high-salt wastewater treatment.