Bacterial community shift and improved performance induced by in situ preparing dual graphene modified bioelectrode in microbial fuel cell. (August 2017)

• Record Type: Journal Article
• Authors: Chen, Junfeng; Hu, Yongyou; Zhang, Lihua; Huang, Wantang; Sun, Jian
• Is Part Of: Bioresource technology. Volume 238(2017)
• Page Start: 273
• Page End: 280
• Publication Date: 2017-08
• Subjects: Bacterial community shift -- In situ microbial-induced reduction -- Dual graphene modified bioelectrode (D-GM-BE) -- Genus analysis -- Improved performance; 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.2017.04.044
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: D-GM-BE was prepared by microbial-induced reduction of GO and polarity reversion. Proteobacteria and Firmicutes were the dominant bacteria in GM-BE. Typical exoelectrogens in GM-BE shared much higher proportion. The maximum power density obtained by D-GM-BE MFC was 2.34 times than C-BE-MFC. Abstract: Dual graphene modified bioelectrode (D-GM-BE) was prepared by in situ microbial-induced reduction of graphene oxide (GO) and polarity reversion in microbial fuel cell (MFC). Next Generation Sequencing technology was used to elucidate bacterial community shift in response to improved performance in D-GM-BE MFC. The results indicated an increase in the relative ratio of Proteobacteria, but a decrease of Firmicutes was observed in graphene modified bioanode (GM-BA); increase of Proteobacteria and Firmicutes were observed in graphene modified biocathode (GM-BC). Genus analysis demonstrated that GM-BE was beneficial to enrich electrogens. Typical exoelectrogens were accounted for 13.02% and 8.83% in GM-BA and GM-BC. Morphology showed that both GM-BA and GM-BC formed 3D-like graphene/biofilm architectures and revealed that the biofilm viability and thickness would decrease to some extent when GM-BE was formed. D-GM-BE MFC obtained the maximum power density by 124.58 ± 6.32 mW m −2, which was 2.34 times over C-BE MFC.