微生物燃料电池
膜生物反应器
膜
膜污染
生物反应器
抗生素
化学
结垢
抗生素耐药性
生物化学
有机化学
电极
物理化学
阳极
作者
Ling Zang,Xiao-Li Yang,Han Xu,Yang-Guang Xia,Hai-Liang Song
标识
DOI:10.1016/j.cej.2024.150578
摘要
The dissemination of antibiotics and antibiotic resistance genes (ARGs) in the environment can potentially pose risks to ecosystems and human health. Herein, a novel microbial fuel cell and membrane bioreactor (MFC-MBR) integrated system characterized by internal reflux of sludge mixtures was proposed to reduce antibiotics, control the spread risk of antibiotic resistance genes (ARGs), and simultaneously alleviate membrane fouling. The bioelectricity production was distinctly promoted with increasing return flow ratios under sulfamethoxazole (SMX) addition. Besides, reactors characterized by higher return flow ratios achieved a relatively elevated degradation rate of SMX, attributed to the enhanced microbial activities through electrical stimulation. Importantly, the absolute abundance of intI1, sul1 and sul3 significantly decreased in the effluent of reactors characterized by higher return flow ratios. The value of zeta potential and particle size of sludge flocs subsequently increased and the content of membrane foulants dropped with the increasing return flow ratios. Moreover, MFC-MBRs characterized by higher return flow ratios were enriched in antibiotic degrading bacteria (Firmicutes, Thauera) and electrochemically active bacteria (Proteobacteria, Bacteroidota). Therefore, this study provided a theoretical basis for reducing the spread of antibiotics and ARGs while simultaneously alleviating fouling, achieving the best of both worlds, through the novel MFC-MBR integrated system.
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