典型离子交换水处理技术在低浓度氨氮回收中的应用分析

Analysis of the application of typical ion exchange water treatment technology in low concentration ammonia nitrogen recovery

离子交换技术具有交换容量高、能耗低、可再生效率高、操作过程简单、环境友好,并且能同时实现水质净化和资源原位回收等优势,在水处理领域应用十分广泛。在文献及工程调研的基础上,综述了3种典型离子交换剂:沸石、粉末树脂、磁性离子交换树脂的技术原理及其在污水处理中的应用现状;分析了三者在低浓度氨氮回收过程中存在的问题,并提出了相应的研究策略;评价了3种离子交换剂在工程化应用中的经济性,主要介绍了成熟的磁性离子交换树脂工艺;通过分析可知,将离子交换技术从污水治理领域应用到污水中低浓度氨氮原位富集回收领域,对污水全面资源化利用具有重要意义。

Ion exchange technology has a broad application prospects in the field of water treatment due to its advantages of high exchange capacity,low energy consumption,high regenerative efficiency,simple operation,environmental friendliness and simultaneous water purification and in situ resources recovery.Based on the analysis of literatures and engineering cases,the technical principles of three typical ion exchangers,such as zeolite,powder resin and magnetic ion exchange resin and their application in wastewater treatment were reviewed.The problems of the three ion exchangers for low concentration ammonia nitrogen recovery were analyzed and their corresponding solutions were proposed.Then their economics in engineering application were evaluated and the mature magnetic ion exchange resin process was mainly introduced.The author believes that the application of ion exchange technology from the field of sewage treatment to the in situ enrichment and recovery of low concentration ammonia nitrogen is of great significance to the comprehensive utilization of sewage resources.