title: Electricity generation from food wastes and microbial community structure in microbial fuel cells.
abstract: Microbial fuel cell (MFC) was studied as an alternate and a novel way to dispose food wastes (FWs) in a waste-to-energy form. Different organic loading rate obviously affected the performance of MFCs fed with FWs. The maximum power density of ~18 W/m(3) (~556 mW/m(2)) was obtained at COD of 3200±400 mg/L and the maximum coulombic efficiency (CE) was ~27.0% at COD of 4900±350 mg/L. The maximum removals of COD, total carbohydrate (TC) and total nitrogen (TN) were ~86.4%, ~95.9% and ~16.1%, respectively. Microbial community analysis using 454 pyrosequencing of 16S rRNA gene demonstrated the combination of the dominant genera of the exoelectrogenic Geobacter and fermentative Bacteroides effectively drove highly efficient and reliable MFC systems with functions of organic matters degradation and electricity generation.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Jianna
authors.initials: J
authors.lastname: Jia
authors.forename: Yu
authors.initials: Y
authors.lastname: Tang
authors.forename: Bingfeng
authors.initials: B
authors.lastname: Liu
authors.forename: Di
authors.initials: D
authors.lastname: Wu
authors.forename: Nanqi
authors.initials: N
authors.lastname: Ren
authors.forename: Defeng
authors.initials: D
authors.lastname: Xing
mesh_terms: D001419:Bacteria / Q000145:classification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D018441:Biofilms; D057919:Biological Oxygen Demand Analysis; D002241:Carbohydrates / Q000032:analysis; D017097:Electric Impedance; D004560:Electricity; D055664:Electrochemical Techniques; D004566:Electrodes; D005502:Food; D009584:Nitrogen / Q000032:analysis; D011506:Proteins / Q000032:analysis; D014866:Waste Products / Q000032:analysis*
chemical_list: D002241:Carbohydrates; D011506:Proteins; D014866:Waste Products; D009584:Nitrogen
keywords: 454 Pyrosequencing; Electricity generation; Food wastes (FWs); Microbial community; Microbial fuel cell (MFC)