摘要： 从序批式反应器活性污泥中分离出1株异养硝化-好氧反硝化细菌——Enterobacter asburiae YT。利用单因素实验得出最佳脱氮条件：柠檬酸钠为碳源，温度30℃，C/N=12，溶氧为0.9 mg/L。通过对该菌株同步硝化反硝化的氮平衡分析，发现24 h内氨氮的去除率达到100%，其中同化到细胞中的氮为30.5%，而以气态氮形式产生的氮损失达到58.38%。菌株YT是一种新型且具有高效脱氮能力的微生物，在生物脱氮领域具有较好的应用价值。

关键词: Enterobacter asburiae, 生物脱氮, 同步硝化反硝化

Abstract: A strain of heterotrophic nitrification-aerobic denitrification bacterium has been isolated from the activated sludge in a sequencing batch reactor. The strain is initially identified as Enterobacter asburiae YT. The optimal nitrogen removal conditions are obtained by means of single factor experiments as follows:using sodium citrate as carbon source,temperature is 30℃,C/N=12 and dissolved oxygen 0.9 mg/L. Based on the nitrogen balance analysis of simultaneous nitrification and denitrification of the strain,it is found that the ammonia nitrogen removing rate reaches 100% within 24 h,of which the percentage of nitrogen assimilated into the cells is 30.5%,and the percentage of nitrogen loss in gaseous state nitrogen is 58.38%. It shows that strain YT is a new type of microbes having highly efficient denitrification ability,which has good application values in the field of biological denirification.

Key words: Enterobacter asburiae, biological denitrification, simultaneous nitrification and denitrification

中图分类号: 

• X172