异养硝化-好氧反硝化菌的脱氮性能研究进展

异养硝化-好氧反硝化(HN-AD)技术可在好氧的情况下同步去除水中的COD与总氮,其脱氮产物大多为无温室效应的氮气,脱氮过程中酸碱中和。然而实际废水成分复杂且水量水质不稳定,这使HN-AD技术的应用受到了限制。近年来不少学者针对不同的环境限制因子对HN-AD菌脱氮能力的影响进行了探索。为此,综述了近几年HN-AD菌在不同环境限制因子影响下的研究进展。

Research progress in the denitrification performances of heterotrophic nitrifying-aerobic denitrifying bacteria

Chemical oxygen demand and total nitrogen in wastewaters could be simultaneously removed from water by heterotrophic nitrification-aerobic denitrification (HN-AD)technology under aerobic conditions.The main denitrification product is mostly nitrogen gas which does not have greenhouse effect,and acid-base neutralization can also be achieved in the process of denitrification.However,the ingredients of actual wastewater are complicated,and the water quantity and water quality are not stable,which limits the application of HN-AD technology.In recently years,many researchers have probed into the influences of different environmental limit factors on the denitrification ability of HN-AD bacteria.Based on this,the research progress in HN-AD bacteria under the influences from different environmental limiting factors is summarized.