为了去除饮用水中的硝酸盐，开发了一种对再生盐水进行间歇生物脱氮的小型离子交换工艺。这项研究表明，组合程序可使再生剂消耗量减少50%，废盐排放量减少90%。该工艺采用序批式反应器，以完成0.5 N氯化钠废再生溶液的生物脱氮。目前正在加利福尼亚州进行试点测试，该过程简单、灵活、可靠- -应适合小型系统使用。包括31个参考文献、表格、图表。

A bench-scale ion exchange process with batch biological denitrification of the spent regenerant brine was developed to remove nitrate from drinking water. This research indicates that the combination procedure results in 50 percent reduction of regenerant consumption and 90 percent reduction in the mass of waste salt discharged. The process features a sequencing batch reactor to accomplish the biological denitrification of a 0.5 N sodium chloride spent regenerant solution. Now being pilot tested in California, the process--which is simple, flexible, and reliable--should be suitable for use by small systems. Includes 31 references, tables, figures.