Abstract:

18 strains of COD degrading bacteria have been separated and screened from high altitude salt lake samples in Xinjiang Province by using organic chemical wastewater medium for treating wastewater,after mixed with 8 strains of bacteria which have high COD degrading rates. Compared to other ordinary activated sludge,the mixed strains show higher COD removing rate(86.3%). Being identified preliminarily by 16S rDNA analysis,it shows that these 8 strains of bacteria belong to the varieties,including Bacteroidetes,Firmicutes and Proteobacteria. The mixed bacterial floras are used in bio-aeration pool tests. The COD removing rate could reach 82.5%,by adding 0.75 g/L of urea as nitrogen sources. The COD degrading rate could be improved to 92.2%,by adding 0.5 g/L of tuna peptone.

Key words: organic chemical wastewater, strain screening, COD degradation

摘要：

利用有机化工废水培养基从新疆高海拔盐湖样品中分离筛选到COD降解菌18株，对COD降解率高的8株菌株混合后处理废水，与其他普通活性污泥相比，COD去除率更高（86.3%）。经16S rDNA初步鉴定，该8株菌分别属于拟杆菌门Bacteroidetes、厚壁菌门Firmicutes和变形菌门Proteobacteria。将该混合菌群用于生物曝气池试验，添加尿素0.75 g/L作为氮源，其COD降解率可达82.5%；添加金枪鱼蛋白胨0.5 g/L可使COD降解率提高到92.2%。

关键词: 有机化工废水, 菌株筛选, COD降解

CLC Number: 

• X703