title: Electricity generation from cattle manure slurry by cassette-electrode microbial fuel cells.
abstract: Cassette-electrode microbial fuel cells (CE-MFCs) are efficient and scalable devices for electricity production from organic waste. Previous studies have demonstrated that CE-MFCs are capable of generating electricity from artificial wastewater at relatively high efficiencies. In this study, a single-cassette CE-MFC was constructed, and its capacity for electricity generation from cattle manure suspended in water (solid to water ratio of 1:50) was examined. The CE-MFC reactor was operated in batch mode for 49 days; electricity generation became stable 2 weeks after initiating the operation. The maximum power density was measured at 16.3 W m⁻³ on day 26. Sequencing analysis of PCR-amplified 16S rRNA gene fragments obtained from the original manure and from anode biofilms suggested that Chloroflexi and Geobacteraceae were abundant in the anode biofilm (29% and 18%, respectively), whereas no Geobacteraceae sequences were detected in the original manure sample. The results of this study suggest that CE-MFCs can be used to generate electricity from water-suspended cattle manure in a scalable MFC system.
authors.affiliation: Interdisciplinary Research Organization, University of Miyazaki, Miyazaki 889-1692, Japan. Electronic address: kinoue@cc.miyazaki-u.ac.jp.
authors.forename: Kengo
authors.initials: K
authors.lastname: Inoue
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Ito
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kawano
authors.forename: Atsushi
authors.initials: A
authors.lastname: Iguchi
authors.forename: Morio
authors.initials: M
authors.lastname: Miyahara
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Kazuya
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D018441:Biofilms; D018533:Biomass; D002417:Cattle; D041862:Chloroflexi / Q000235:genetics / Q000378:metabolism; D020564:Deltaproteobacteria / Q000235:genetics / Q000378:metabolism; D004560:Electricity; D004566:Electrodes / Q000382:microbiology; D008372:Manure / Q000382:microbiology*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D059205:Renewable Energy; D013997:Time Factors
chemical_list: D008372:Manure; D012336:RNA, Ribosomal, 16S
keywords: Anaerobic digestion; Biomass; Geobacteraceae; Microbial community; Microbial fuel cell; Sustainable energy