Efficacy of electrochemical membrane bioreactor for virus removal from wastewater: Performance and mechanisms. (June 2021)

• Record Type: Journal Article
• Authors: Chen, Mei; Lei, Qian; Ren, Lehui; Li, Jiayi; Li, Xuesong; Wang, Zhiwei
• Is Part Of: Bioresource technology. Volume 330(2021)
• Publication Date: 2021-06
• Subjects: Disinfection -- Virus removal -- Electrochemical membrane bioreactor -- Wastewater treatment; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.124946
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: An electrochemical MBR (EMBR) was developed for removing virus from wastewater. An electric field (2.0 V) in EMBR system could achieve ~100% virus removal. The control MBR exhibited a very low removal efficiency (19.8% on average). The fouling in EMBR was significantly mitigated due to the presence of electric field. Reactive oxidants produced on electrodes were mainly responsible for MS2 removal. Abstract: Wastewater treatment facilities play pivotal roles in preventing the transmission of water-borne viruses and protecting human health. In this study, a new electrochemical membrane bioreactor (EMBR) was proposed to achieve a long-lasting and efficient removal of virus from wastewater. Results showed that applying a low electric field (2.0 V) in EMBR system could achieve ~100% removal efficiency at both batch tests and continuous flow experiments. In contrast, the control MBR, without the exertion of electric field, exhibited a very low removal efficiency (19.8% on average). Moreover, the fouling in EMBR was significantly mitigated, which enabled its operation duration almost 3 times longer than that of the control. Further explorations suggested that the reactive oxidants generated on electrodes in the EMBR system were mainly responsible for MS2 removal. This study demonstrated the potential of utilizing the EMBR process to achieve an enhanced virus disinfection efficiency during the wastewater treatment process.