Journal
BIORESOURCE TECHNOLOGY
Volume 238, Issue -, Pages 273-280Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.04.044
Keywords
Bacterial community shift; In situ microbial-induced reduction; Dual graphene modified bioelectrode (D-GM-BE); Genus analysis; Improved performance
Funding
- National Natural Science Fund of China [21477039, U1401235, 51108186]
- Science and Technology Planning Project of Guangdong province, China [2014A020216042]
- Scientific and Technological Planning Project of Guangzhou, China [201607010318]
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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 +/- 6.32mWm(2), which was 2.34 times over C-BE MFC. (C) 2017 Elsevier Ltd. All rights reserved.
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