多功能水处理菌Pseudomonas stutzeri CDN1的筛选分离与性质鉴定

摘要

Being screened from activated sludge,the aerobic denitrification strain CDN1 was identified as Pseudomonas stutzeri by conventional biochemical identification,Vitek-32 Bacterial identification system and 16S rDNA analysis. When aerobic cultured at 25℃, 200 r/min, the culture of the strain Pseudomonas stutzeri CDN1 showed high-efficiency aerobic denitrification,with the highest NO3-N digradation rate of 94.01％, and also showed high flocculation activity against Kaolin, with the highest flocculating rate of 79.82％.%从生活污水处理场活性污泥中筛选分离到1株具有好氧反硝化特性的菌株CDNI,经过常规生理生化鉴定、Vitek-32细菌鉴定系统鉴定结合16S rDNA鉴定,确定其为施氏假单胞菌(Pseudomonasstutzeri).菌株Pseudomonas stutzeri CDN1在好氧培养(25℃,200 r/min)时具有很强的反硝化活性,对硝态氮(NO<'-><,3>-N)的降解率最高可达到94.01%.同时对其絮凝活性进行了测定,结果显示该菌对高岭土具有较好的絮凝活性,最高可达到79.82%.