title: Dark fermentation, anaerobic digestion and microbial fuel cells: An integrated system to valorize swine manure and rice bran.
abstract: This work describes how dark fermentation (DF), anaerobic digestion (AD) and microbial fuel cells (MFC) and solid-liquid separation can be integrated to co-produce valuable biochemicals (hydrogen and methane), bioelectricity and biofertilizers. Two integrated systems (System 1: AD+MFC, and System 2: DF+AD+MFC) are described and compared to a traditional one-stage AD system in converting a mixture (COD=124±8.1gO2kg(-1)Fresh Matter) of swine manure and rice bran. System 1 gave a biomethane yield of 182 LCH4kg(-1)COD-added, while System 2 gave L yields of bio-hydrogen and bio-methane of 27.3±7.2LH2kg(-1)COD-added and 154±14LCH4kg(-1)COD-added, respectively. A solid-liquid separation (SLS) step was applied to the digested slurry, giving solid and liquid fractions. The liquid fraction was treated via the MFC-steps, showing power densities of 12-13Wm(-3) (500Ω) and average bioelectricity yields of 39.8Whkg(-1)COD to 54.2Whkg(-1)COD.
authors.affiliation: DiSAA - University of Milan, Via Celoria 2, 290133 Milano, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Schievano
authors.affiliation: Gruppo Ricicla - DiSAA, University of Milan, Via Celoria 2, 20133 Milano, Italy.
authors.forename: Tommy Pepè
authors.initials: TP
authors.lastname: Sciarria
authors.affiliation: College of Engineering, China Agriculture University, Beijing 100083, China.
authors.forename: Yong Chang
authors.initials: YC
authors.lastname: Gao
authors.affiliation: Gruppo Ricicla - DiSAA, University of Milan, Via Celoria 2, 20133 Milano, Italy.
authors.forename: Barbara
authors.initials: B
authors.lastname: Scaglia
authors.affiliation: Gruppo Ricicla - DiSAA, University of Milan, Via Celoria 2, 20133 Milano, Italy.
authors.forename: Silvia
authors.initials: S
authors.lastname: Salati
authors.affiliation: DAFNAE, University of Padova, Viale dell'Università 16, Legnaro (PD), Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Zanardo
authors.affiliation: College of Engineering, China Agriculture University, Beijing 100083, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Quiao
authors.affiliation: College of Engineering, China Agriculture University, Beijing 100083, China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Dong
authors.affiliation: Gruppo Ricicla - DiSAA, University of Milan, Via Celoria 2, 20133 Milano, Italy. Electronic address: fabrizio.adani@unimi.it.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Adani
mesh_terms: D000818:Animals; D001674:Bioelectric Energy Sources; D056804:Biofuels / Q000032:analysis*; D019149:Bioreactors; D005285:Fermentation; D006859:Hydrogen / Q000032:analysis*; D008372:Manure / Q000032:analysis*; D008697:Methane / Q000032:analysis*; D012275:Oryza / Q000737:chemistry*; D034421:Sus scrofa
chemical_list: D056804:Biofuels; D008372:Manure; D006859:Hydrogen; D008697:Methane
keywords: Bio-fertilizers; Biogas; Integrated system; Microbial fuel cell