【摘要】 高盐废水"零排放"是当今很多企业需要面临的非常严峻的环保问题,而离子膜电渗析由于其独特的分离机制能够实现高盐废水中无机盐的分离、浓缩和资源化利用,从而实现水和盐的回收利用。本文综述了离子膜电渗析目前在高盐废水"零排放"盐浓缩工艺中的应用情况;展望了电渗析在高盐高COD废水中的应用前景以及新型的电渗析技术如选择性电渗析和双极膜电渗析在混盐分离和盐的资源化利用中的机遇;同时指出离子膜电渗析在大规模应用中仍存在很多挑战,如离子膜性能的提高、电渗析工艺的优化和电渗析设备的投资成本和能耗如何降低。本文将为高盐废水"零排放"提供新思路,同时为离子膜电渗析在高盐废水"零排放"中的规模化应用奠定基础。更多还原

【Abstract】 Recently, high-salinity wastewater "zero liquid discharge" has become a seriously environmental issue for many companies, while the salts in high-salinity wastewater can be separated,concentrated, and reutilized by ion exchange membrane electrodialysis due to its special separationmechanism, resulting in the recycling of water and salts. In this paper, an application of ion exchangemembrane electrodialysis in high-salinity"zero liquid discharge" for recent years was reviewed.Additionally, the potential of electrodialysis for treating high-salinity-high-COD wastewater wasprospected, as well as the opportunity of the novel electrodialysis such as selective electrodialysis andbipolar membrane electrodialysis for separation of mixed salts and reutilization of the separated salts.Meanwhile, many challenges were point out in consideration of the large-scale application of electrodialysis, such as the advancement of ion exchange membrane properties, optimization ofelectrodialysis process, and the decrease in investment and running cost for electrodialysis apparatus. The progress proposed in this paper will provide a new method for the high-salinity wastewater"zero liquid discharge". Besides, this progress will lay the foundations for large-scale application of ion exchange membrane electrodialysis in the high-salinity wastewater"zero liquid discharge".更多还原