Details

Autor(en) / Beteiligte

• Luo, Jingyang
• Cheng, Xiaoshi
• Su, Yinglong
• Zhang, Le
• Du, Wei
• Bao, Xingchen
• Huang, Wenxuan
• Feng, Qian
• Cao, Jiashun
• Wu, Yang

Titel

Metagenomic assembly deciphered the type-dependent effects of surfactants on the fates of antibiotics resistance genes during sludge fermentation and the underlying mechanisms

Ist Teil von

• The Science of the total environment, 2022-02, Vol.807 (Pt 1), p.150822-150822, Article 150822

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• Waste activated sludge (WAS) is an important reservoir of antibiotic resistance genes (ARGs). However, the interactive effects of co-existed substances in WAS on ARGs fates have yet to be disclosed. This study demonstrated the type-dependent effects of surfactants (potentially effective chemicals for WAS disposal) on the reduction of ARGs during WAS fermentation, which followed the order of linear alkylbenzene sulphonates (LAS) > alkyl polyglucoside (APG) > hexadecyl trimethyl ammonium bromide (HTAB). Interestingly, the ratio of ARGs affiliated to efflux pump showed an upward trend in the surfactant-treated reactor. Mechanistic investigations revealed that the extracellular polymeric substances (EPS) destruction induced by surfactants increased the permeability of bacterial cells and caused the ARGs being released and susceptible for subsequent elimination. Besides, the surfactants significantly altered the microbial community, resulting in the ARGs reduction via changing the potential hosts. Also, the metabolic pathways participated in the dissemination of ARGs were remarkably down-regulated, thereby resulting in the reduction of ARGs abundances. This work broadened the understanding of ARGs fates during WAS fermentation and provided insights on the interactive functions of exogenous chemicals in multiple matrics. [Display omitted] •Surfactants exhibited type-dependent effects on the ARGs removal.•The presence of surfactants caused the enrichment of efflux pump related ARGs.•The effective EPS disintegration contributed to the ARGs removal.•The microbial community shift and their co-occurrence with ARGs were disclosed.•Surfactants downregulated the metabolic pathway related with ARGs propagation.