废水脱氮工艺的原理、特征与应用

Principles,features and applications of nitrogen removal processes from wastewater

废水因其来源不同,一般会含有不同浓度的化合态氮,直接排入受纳水体,不仅会造成水体中溶解氧的枯竭,还会导致水体的富营养化。为了更好地选择废水脱氮的有效工艺,对废水脱氮的生物、化学、物理化学工艺分别进行了阐述,并分析了各自的脱氮原理、特征、实现条件及应用前景。

Because of different sources, there are kinds of combined nitrogen in wastewater. If the wastewater is drained into natural rivers directly without treatment, dissolved oxygen in the rivers will be used up and eutrophication will turn up. In order to select rational nitrogen removal processes, several available nitrogen removal processes are reviewed, including biological, chemical and physical-chemical aspects. The principles, features, operation conditions and application perspectives of each process are also focused and analyzed.