Effects of ultraviolet radiation on the community structure and metabolic pathways of A2O process in Plateau environment

<p>Water treatment ecosystem provides important habitats for various bacterial communities, but the response mechanism of this under ultraviolet rays is not yet clear. For reason, 16S rRNA gene sequencing used to study community structure and metabolic pathways irradiation. Studies have shown that communities different irradiation are different, which indicates time has an impact on communities. Analysis driving factors shows COD, pH, TN NH3-N also relative abundance key species. Key species Bacteroidetes, Proteobacteria, Actinobacteria, Firmicutes, Chloroflexi, Chlamydiae, accounting 96.69%～98.30%, a significant inhibitory effect As dominant phyla in Plateau environment, Chlamydiae discovered first time. The network co-occurrence diagrams constructed radiation show each sample composed three independent diagrams. There 6 common 33 genera sample, reveals more similar microorganisms, rather than random phenomena. It reflects competitive relationship between adaptability bacteria environment. Through analysis pathways, it found environment certain changes radiation. Further carbon, nitrogen phosphorus related change, difference diagram small, is, mainly reflected pathways. These findings indicate as influencing factor microbial This research theoretical basis further understanding water new perspective sewage systems.</p>