饮用水中硝酸盐去除方法比较

Removal of Nitrate from Drinking Water.

本文综述了饮用水中硝酸盐的各种去除方法及其优缺点.通过分析比较,认为离子交换法和生物反硝化法都可用于大规模生产饮用水,但最有发展前途目前研究最多的是生物反硝化法.该法将硝酸盐转化为氮气,无废液产生,处理费用低.但异氧反硝化法需进行复杂的后处理除去过量的有机物,自养反硝化法会造成出水硫酸盐含量增高.

This paper discusses the methods for the removal of nitrate from drinking water, and their advantages and disadvantages. Analysis and comparison show that both ion exchange and dinitrification can be used in the productions of drinking water in large scale. However, denitrification is even more promising and is currently under conpre-hensive study. The process turns nitrate into nitrogen, with no waste water produced. The cost of the method is low. But, heterotrophic denitrification needs further complicated treatment to remove extra amount of organic compounds and autotro- phic denitirification causes high sulfate content in the treated water.