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| Effect of microbial community on pipe corrosion in the actual gravity flow drainage pipe |
| SHENTU Hua-bin1, ZHANG Yi-fu2, QIAN Dong3, WANG Hao4, LIU Jing-qing2 |
1. Shanghai Water Engineering Design & Research Institue CO,. LTD, Shanghai 210061;
2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
3. China Energy Engineering Group Zhejiang Electric Power Design Institute CO., LTD, Hangzhou 310012, China;
4. China United Engineering Corporation Limited, Hangzhou 310022, China |
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Abstract To explore the differences in microbial community distribution and the influences of water quality on the correlation of microbial community diversity distribution, the biofilms and bulk water in 10 typical corrosive segments in actual gravity flow drainage pipes were sampled as the research objects. The diversities of microbial communities in corroded areas were presented by high-throughput sequencing. The results showed the microbial community structures in these 10typical corrosive parts were basically similar. Proteobacteria were the dominant bacteria in phylum level, followed by Actinobacteria. Alpha-proteobacteria and Beta-proteobacteria account for 43.56% in class level. In genus level, Sulfate reducing bacterium caused severe localized corrosion in pipes, including Desulforhabdus, Desulfuromonas and Desulfobacter. RDA Environmental impact factor analysis pointed out there was certain correlation between sulfuretted hydrogen, dissolve oxygen and microbial community in phylum level. Besides, ammonium ion, pH and COD are the main chemical factors in class level which have correlations with microbial communities.
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Received: 23 July 2018
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