生物法除去废水中硝酸盐的研究进展

Biological Removal of Nitrate from Water and Wastewater

废水中的硝酸盐给人类及动物带来了不利的影响而受到日益重视,生物反硝化脱氮法可以很好地将硝酸盐化合物还原为对人类无害的氮气。首先叙述水污染物硝酸盐以及由其引起的一系列问题,然后再讨论除去硝酸盐的各种方法和研究进展,最后,介绍一种有效的处理各种不同含氮废水的方法——生物电化学脱氮法。

Nitrates in wastewater streams became the serious problem due to the impacts on human and animal health. Inverse methods are reported to remove nitrate from water streams but they almost fail to entirely treat nitrate,except biological denitrification that is capable of reducing inorganic nitrate compounds to harmless nitrogen gas. Also,the denitrifiers could be fed with organic and inorganic substrates. The review of heterotrophic and autotrophic denitrifications concludes that auto-autotrophic denitrifiers are more effective in denitrification. This paper describes the water pollution caused by nitrates,as well as a range of issues,and then discusses the progress of various research methods about treat nitrate and introduces an effective treatment of wastewater containing various methods,the Bio-electrochemical removal of nitrate.