Microbial community evolution and fate of antibiotic resistance genes along six different full-scale municipal wastewater treatment processes. (January 2019)

• Record Type: Journal Article
• Authors: Tong, Juan; Tang, Anping; Wang, Hongyan; Liu, Xingxin; Huang, Zhaohua; Wang, Ziyue; Zhang, Junya; Wei, Yuansong; Su, ·Yanyan; Zhang, Yifeng
• Is Part Of: Bioresource technology. Volume 272(2019)
• Page Start: 489
• Page End: 500
• Publication Date: 2019-01
• Subjects: Antibiotic resistance genes -- Microbial community evolution -- Full-scale wastewater treatment plant -- Network analysis -- Multiple linear regression; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.10.079
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Similar influents in varied processes lead to similar sludge microbial community. HGT might mainly occur in an aeration tank rather than the anaerobic/anoxic tank. Higher co-occurrence of potential pathogens and ARGs in wastewater than in sludge. Microbial biomass mainly drive ARGs in wastewater, while MGEs drive ARGs in sludge. Enhancement in nutrients removal and tertiary treatment would benefit ARGs removal. Abstract: The evolution of microbial community and the fate of ARGs along different full-scale wastewater treatment processes (i.e., Anaerobic-Anoxic-Oxic, Oxidation Ditch, and Cyclic Activated Sludge System) were investigated in this study. We found that the sludges of bioreactors treating similar influent showed the similar microbial communities, independent of the treatment technologies. The horizontal gene transfer (HGT) mainly occurred in aeration tank rather that anaerobic/anoxic tank. More co-occurrence of potential pathogens and ARGs was found in wastewater than in sludge. Microbial biomass was the key driver for the fate of ARGs in wastewater, while mobile genetic elements (MGEs) was the key factor for the fate of ARGs in sludge. Combination of wastewater characteristics, microbial diversity, microbial biomass, and MGEs contributed to the variation of ARGs. Finally, it was found that enhanced nutrients removal process and tertiary treatment would benefit ARGs removal.