Details

Autor(en) / Beteiligte

• Huang, Kailong
• Mao, Yanping
• Zhao, Fuzheng
• Zhang, Xu-Xiang
• Ju, Feng
• Ye, Lin
• Wang, Yulin
• Li, Bing
• Ren, Hongqiang
• Zhang, Tong

Titel

Free-living bacteria and potential bacterial pathogens in sewage treatment plants

Ist Teil von

• Applied microbiology and biotechnology, 2018-03, Vol.102 (5), p.2455-2464

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• To comprehensively understand the profile of free-living bacteria and potential bacterial pathogens in sewage treatment plants (STPs), this study applied high-throughput sequencing-based metagenomics approaches to investigate the effects of activated sludge (AS) treatment process and ultraviolet (UV) disinfection on the community of bacterial pathogens in two full-scale STPs. A total of 23 bacterial genera were identified as free-living bacteria, and 243 species/OTU 97% were identified as potential bacterial pathogens, 6 of which were confidently detected in the STPs (with the total abundances ranging from 0.02 to 14.19%). Both diversity and relative abundance of the detected bacterial pathogens decreased obviously after AS treatment process ( p  < 0.05), and increased slightly after sedimentation ( p  < 0.05). UV disinfection shows no obvious effects on the total relative abundance of the free-living pathogenic bacteria in sewage. Although large amounts of the particle-bound pathogens were eliminated through the sewage treatment process, the STPs could not effectively remove the free-living bacterial pathogens, and some pathogenic bacteria (e.g., Pseudomonas aeruginosa ) present in the effluent had higher relative abundance after UV disinfection. Overall, the results extend our knowledge regarding the community of potential pathogens (especially free-living pathogens) in STPs.