摘要

       本研究调查了微生物群落的演变和 ARGs 在不同全面废水处理过程（即厌氧-缺氧-好氧、氧化沟和循环活性污泥系统）中的归宿。 我们发现，处理类似进水的生物反应器的污泥显示出类似的微生物群落，与处理技术无关。 水平基因转移（HGT）主要发生在曝气池而不是厌氧/缺氧池。 与污泥相比，在废水中发现了更多的潜在病原体和 ARGs 共存。 微生物生物量是废水中 ARGs 归宿的关键驱动因素，而移动遗传元件 (MGEs) 是污泥中 ARGs 归宿的关键因素。 废水特征、微生物多样性、微生物生物量和 MGE 的结合导致了 ARG 的变化。 最后，发现增强的营养物去除过程和三级处理将有利于 ARGs 的去除。

       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.

https://www.sciencedirect.com/science/article/abs/pii/S0960852418315116