Abstract:An anaerobic membrane bioreactor was run at a room temperature to investigate the relationship between microbial community structure and membrane fouling. Changes in the microbial community structure of membrane surfaces were studied by terminal restriction fragment length polymorphism analysis (T-RFLP) technology. The relationship between the microbial community structure and soluble microbial products (SMP), extracellular polymeric substances (EPS) were also investigated. Membrane fouling period was 18d at a room temperature, and the removal rate of CODCr was approximately 93%. The succession of microbial populations made the concentration of microbial metabolites gradually increased and accelerated the process of membrane fouling. The dominant microbial species of membrane surface were Raoultella, Owenweeksia hongkongensis when film pressure was slowly rising. When the pressure rose steadily, the dominant bacteria changed into Delftia acidovorans, Halothiobacillus neapolitanus. At last, the microbe of bp78 become the climax community. When the membrane fouling is through the slow rising period and steady rising period, the pressure (pTM) and the diversity of microbial community structure showed a significant positive correlation. When membrane fouling was in the rapid rising stage, top community appeared on the surface of the membrane silk, and microbial community diversity decreased significantly. At this point, the diversity of microbial community structure showed weakly related with the membrane pressure. The evenness of microbial community on membrane surface increased firstly and then decreased as membrane pressure rose, and the microbe continued to adhere on the membrane surface firstly, and then competed with each other until the top community appeared.
隋力新, 胡奇, 高大文. 常温厌氧MBR中微生物群落结构与膜污染研究[J]. 中国环境科学, 2015, 35(1): 110-115.
SUI Li-Xin, HU Qi, GAO Da-Wen. The relationship between microbial community structure and anaerobic MBR membrane fouling at a room temperature. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(1): 110-115.