摘要

      在本研究中，我们建立了三个厌氧消化实验，以探讨固体停留时间（SRT）对抗生素抗性基因（ARG）命运的影响，其中包括污泥厌氧消化（CK）的影响，微波预处理污泥（MW）的一级厌氧消化和微波预处理污泥（酸性和CH4）的两级厌氧消化。ARGs对SRT的响应因ARG类型和反应器结构的不同而有显著差异。较短的SRT有利于CK和两段消化过程中ARGs的还原，而MW则需要较长的SRT来还原ARGs。考虑到反应器结构引起的微生物群落变化，SRT的作用是有限的。部分冗余分析和结构方程模型分析表明，SRT对ARGs归宿的作用主要归因于重金属的协同选择。

       In this study, three anaerobic digestion experiments were established to investigate the effects of solids retention times (SRT) on the fate of antibiotic resistance genes (ARGs) including anaerobic digestion of sewage sludge (CK), one-stage anaerobic digestion of microwave pretreatment sludge (MW) and two-stage anaerobic digestion of microwave pretreatment sludge (Acid stage and CH₄ stage). The response of ARGs to the SRT varied significantly from ARG types and reactor configurations. Shorter SRT could avail the ARGs reduction for CK and two-stage digestion, while MW need longer SRT for the ARGs reduction. Concerning the variance of microbial community caused by reactor configurations, the role of SRT was limited. The partial redundancy analysis and structural equation models analysis indicated that the role of SRT on the ARGs fate could be attributed the most to the co-selection from heavy metals.

        https://www.sciencedirect.com/science/article/abs/pii/S0960852418316523?via%3Dihub