Abstract
In the present study, distribution characteristics and biodiversity of microbial communities from four real sewer pipes in urban residential area were studied. The differences of microbial community were observed in spatial distribution. The genus of Mycobacterium, Acidiphilium and Acidithiobacillus were mainly detected in the upper and middle part. Methanthrix, Longilinea and Desulfobulbus were dominant in the bottom part. Total nitrogen, sulfate and oxidation–reduction potential were identified to be the crucial driving factors in the formation of microbial community. The corrosion differences in different sites primarily resulted from the differences of microbial communities in upper parts. From the evaluation of microbial induced concrete corrosion, sulfate-reducing bacteria and fermentation bacteria in bottom part and sulfur-oxidizing bacteria in upper part played a major role. Further, the middle and end of the sewer pipes faced greater risk of concrete corrosion than the beginning parts.
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