超滤(肾)
微滤
膜
过滤(数学)
膜污染
流出物
化学
色谱法
废水
结垢
细菌
食品科学
微生物学
生物
环境工程
生物化学
环境科学
统计
遗传学
数学
作者
Christian Hiller,Christoph Schwaller,Christian Wurzbacher,Jörg E. Drewes
标识
DOI:10.1016/j.scitotenv.2022.156052
摘要
Low-pressure membrane filtration was investigated at pilot scale with regard to its removal of antimicrobial resistance genes (ARGs) in conventional secondary treated wastewater plant effluents. While operating microfiltration (MF) and ultrafiltration (UF) membranes, key operational parameters for antimicrobial resistance (AMR) studies and key factors influencing AMR removal efficiencies of low-pressure membrane filtration processes were examined. The main factor for AMR removal was the pore size of the membrane. The formation of the fouling layer on capillary membranes had only a small additive effect on intra- and extrachromosomal ARG removal and a significant additive effect on mobile ARG removal. Using feeds with different ARGs abundances revealed that higher ARG abundance in the feed resulted in higher ARG abundance in the filtrate. Live-Dead cell counting in UF filtrate showed intact bacteria breaking through the UF membrane. Strong correlations between 16S rRNA genes (as surrogate for bacteria quantification) and the sul1 gene in UF filtrate indicated ARBs likely breaking through UF membranes.
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