title: Electricity generation from rice bran in microbial fuel cells.
abstract: BACKGROUND
  Rice bran is a by-product of the rice milling process and mostly discarded in Japan. Although many studies have shown that microbial fuel cells (MFCs) are able to generate electricity from organic wastes, limited studies have examined MFCs for generating electricity from rice bran.
  
  
  RESULTS
  Laboratory-scale single-chamber MFCs were inoculated with paddy field soil and supplied with rice bran for examining electricity generation. Power outputs and microbiome compositions were compared between MFCs containing pure water as the liquid phase (MFC-W) and those containing mineral solution (MFC-M). Polarization analyses showed that both MFCs successfully generated electricity with the maximum power densities of 360 and 520 mW m-2(based on the projected area of anode) for MFC-W and MFC-M, respectively. Amplicon-sequencing analyses revealed thatTrichococcusandGeobacterspecifically occurred in anode biofilms in MFC-W and MFC-M, respectively.
  
  
  CONCLUSIONS
  The results suggest that rice bran is a feasible fuel by itself for generating electricity in MFCs.
authors.affiliation: School of Life Science, Tokyo University of Pharmacy and Life Sciences, Tokyo, 192-0392 Japan.
authors.forename: Shu
authors.initials: S
authors.lastname: Takahashi
authors.affiliation: School of Life Science, Tokyo University of Pharmacy and Life Sciences, Tokyo, 192-0392 Japan ; Meidensha Corporation, Shinagawa, Tokyo 141-8616 Japan.
authors.forename: Morio
authors.initials: M
authors.lastname: Miyahara
authors.affiliation: School of Life Science, Tokyo University of Pharmacy and Life Sciences, Tokyo, 192-0392 Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kouzuma
authors.affiliation: School of Life Science, Tokyo University of Pharmacy and Life Sciences, Tokyo, 192-0392 Japan.
authors.forename: Kazuya
authors.initials: K
authors.lastname: Watanabe
keywords: Desulfuromonadales; Exoelectrogen; Lactobacillales; Pyrosequencing; Rice bran