Abstract:The microbial community in the IAMBR activated sludge grown in a oligotrophic condition was investigated with PCR-DGGE technology and the treatment effect of the IAMBR system was evaluated. The results showed that there was a high degree of cooperativity among the diversity, similarity and population belonging of the total bacteria. In the first 18days, the ammonia nitrogen removal dropped from 95% to 73%, and then increased to 82%. At the same time, the SVI increased from 123.7mL/g to 135.2mL/g, and then decreased to 128.4mL/g. Microbial community experienced a drastic succession at the end of experimental period. The similarity index of bacteria dropped to 63.6%, and the SVI increased to 132.5mL/g eventually. The cloning sequencing analysis revealed that the majority of bacteria in the IAMBR belonged to uncultured bacterium and the Nitrosospira held a dominant position. The research showed that oligotrophic condition had adverse effects on microbial community in the IAMBR. The sense of functional orientation of the microbial community was obvious and the nitrifying bacteria occupied a dominant position.
薛圆圆, 孙宝盛, 杜江, 薛士琼, 王明圆, 李恺. 贫营养条件下IAMBR污泥微生物群落结构的演变[J]. 中国环境科学, 2015, 35(3): 839-845.
XUE Yuan-Yuan, SUN Bao-Sheng, DU Jiang, XUE Shi-Qiong, WANG Ming-Yuan, LI Kai. Analysis of IAMBR on succession of sludge microbial community composition in the oligotrophic condition. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(3): 839-845.