耐冷好氧反硝化菌脱氮技术研究进展

RESEARCH PROGRESS ON NITROGEN REMOVAL OF COLD RESISTANCE AEROBIC DENITRIFYING BACTERIA

耐冷好氧反硝化菌因其独特的生长特性与同步异养硝化好氧反硝化的功能,为解决天然水体中氮素的去除提供了新的技术思路。综述了好氧反硝化作用机理研究进展,包括耐冷好氧反硝化菌的富集-驯化-筛选方法,已分离的耐冷好氧反硝化菌的类群及其生长特性,耐冷好氧反硝化菌的生物脱氮影响因素及其应用领域。耐冷好氧反硝化菌在低温环境生物脱氮方面具有明显的优势。因此,对耐冷好氧反硝化菌的脱氮作用机理和实际工程应用进行展望。

In the past few years,increasing number of researchers focused on cold resistance aerobic denitrification bacteria for their outstanding growth characteristics and function of simultaneous heterotrophic nitrification and aerobic denitrification,which could provide support for the nitrogen removal of natural water.The mechanisms of cold-resistant and aerobic denitrification bacteria,the methods of enrichment-domestication-screening for cold-resistant aerobic denitrifiers,the isolated strains and their growth characteristics were summarized in this paper.Furthermore,the influencing factors of cold-resistant denitrifiers were explored,and the application of aerobic denitrification in environmental bioremediation was discussed.Researches demonstrated that cold-resistant aerobic denitrifiers had obvious technological advantages in nitrogen removal,but the mechanism of cold-resistant and aerobic denitrification required further study for its application in environmental bioremediation.Moreover,the methods for the enrichment-domestication-screening for cold-resistant aerobic denitrifiers were still not perfect,especially,there was little research reported on cold-resistant denitrifiers based on practical engineering application and more focus was need in future study.