实际重力流排水管道中微生物群落对管道的腐蚀影响

通过在实际重力流排水管道中选取10个典型的腐蚀区域作为研究对象，通过对排水管道对应腐蚀区域的生物膜和水体进行采样，探究实际排水管道不同空间位置上微生物群落分布的差异性以及水质因素对微生物群落多样性分布影响.采用高通量测序方法反映腐蚀区域微生物群落的多样性.结果表明，在排水管道中10个典型腐蚀区域中的微生物群落分布结构基本相似，在门水平上主要是变形菌占绝对优势，其次是放线菌门，在纲水平上主要是a-变形菌纲，其次是β-变形菌纲两者相对含量之和占到43.56%，在属水平上的硫酸盐还原菌对管道具有严重的局部腐蚀，包含有Desulforhabdus，Desulfuromonas，Desulfobacter.RDA环境影响因子研究发现，在门水平上硫化氢、溶解氧与微生物群落存在一定的相关性，在纲水平上与微生物群落存在相关性的主要是铵根离子、pH值和COD.

Effect of microbial community on pipe corrosion in the actual gravity flow drainage pipe

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.