Journal of Environmental Engineering Technology ›› 2011, Vol. 1 ›› Issue (2): 145-150.doi: 10.3969/j.issn.1674-991X.2011.02.024

• Control and Management of Water Toxicity • Previous Articles     Next Articles

Research on Change of Biotic Community Structure in A/O MBR Process

CHEN Xiao-gang1,2,ZHANG Hong-lin1,YU Bing1,ZHU Qiong-fang2,3,ZHANG Juan2,4,ZHAO Xiao-feng2   

  1. 1. School of Environmental and Biological Engineering, Liaoning University of Petroleum & Chemical Technology2. Chinese Research Academy of Environmental Sciences
    3. College of Environmental Science and Engineering, South China University of technology
    4. Resource and Environment College, Anhui Agricultural University
  • Received:2010-09-30 Revised:2011-01-04 Online:2011-03-20 Published:2011-03-01
  • Contact: ZHANG Hong-lin

Abstract: An anoxic-oxic membrane bioreactor (MBR) combination technology was used for treating campus domestic sewage. The sludge samples were collected every 24 hours to analyze the structure of biotic community and species composition in different periods. Meanwhile, the indicators of the sewage effluent and sludge quality were monitored and the relationship between biotic community structure and the removal rates of CODCr, NH4+-N and TP were studied. The results showed that during the running time, the flocculate structure of activated sludge changed among close-loose-tight-bulking, and the number of filamentous bacteria gradually increased, changing from 0 level, ±level, + level to ++ level.The change of the fauna community-Vorticellidae,Rotifera,Epistylis insects was found to have relation with sludge structure, and so the fauna community could be used as the indicator of sludge bulking as well as the time point of sludge discharging. The population size of microfauna and dominant fauna varied with the water quality, and the population of Sessile Vorticellidae,Cyst and Epistylis could be used as the bioindicator of CODCr concentration of the effluent.The dynamic relationship between the removal rates of NH4+-N,TP and microfauna community structure was not significant.

Key words: A/O, MBR, biotic community structure, Bioindicator