title: Biogas production within the bioethanol production chain: Use of co-substrates for anaerobic digestion of sugar beet vinasse.
abstract: Bioethanol production generates large amounts of vinasse, which is suitable for biogas production. In this study, the anaerobic digestion of sugar beet vinasse was optimised using continuous stirred-tank reactors (CSTR) supplemented either with lime fertiliser or with 3% cow manure. In both reactors, the C/N ratio was adjusted by adding straw. The biochemical methane potential (BMP) of vinasse was 267.4±4.5LCH4kgVS(-1). Due to the low content of macro- and micronutrients and low C/N ratio of vinasse, biogas production failed when vinasse alone was fed to the reactor. When co-substrate was added, biogas production achieved very close to the BMP of vinasse, being 235.7±32.2LCH4kgVS(-1) from the fertiliser supplied reactor and 265.2±26.8LCH4kgVS(-1) in manure supplied reactor at steady state. Anaerobic digestion was the most stable when cow manure was supplied to digestion of vinasse.
authors.affiliation: Brazilian Bioethanol Science and Technology Laboratory (CTBE), Brazilian Center for Research in Energy and Materials (CNPEM), Rua Giuseppe Máximo Scolfaro, 10000, Polo II de Alta Tecnologia, P.O. Box 6170, Campinas, São Paulo 13083 - 970, Brazil. Electronic address: bruna.moraes@bioetanol.org.br.
authors.forename: B S
authors.initials: BS
authors.lastname: Moraes
authors.affiliation: Department of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
authors.forename: J M
authors.initials: JM
authors.lastname: Triolo
authors.affiliation: Department of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
authors.forename: V P
authors.initials: VP
authors.lastname: Lecona
authors.affiliation: Biological Processes Laboratory (LPB), Center for Research, Development and Innovation in Environmental Engineering (CPDI-EA), São Carlos Engineering School (EESC), University of São Paulo (USP), Av. João Dagnone, 1100, Santa Angelina, São Carlos, São Paulo 13563 - 120, Brazil.
authors.forename: M
authors.initials: M
authors.lastname: Zaiat
authors.affiliation: Department of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
authors.forename: S G
authors.initials: SG
authors.lastname: Sommer
mesh_terms: D000693:Anaerobiosis / Q000502:physiology; D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D027461:Beta vulgaris / Q000382:microbiology*; D056804:Biofuels / Q000382:microbiology; D002417:Cattle; D000431:Ethanol; D007220:Industrial Waste / Q000517:prevention & control*; D008372:Manure / Q000382:microbiology*; D008697:Methane / Q000302:isolation & purification / Q000378:metabolism*; D035261:Plant Components, Aerial / Q000382:microbiology; D012037:Refuse Disposal / Q000379:methods; D062611:Solid Waste
chemical_list: D056804:Biofuels; D007220:Industrial Waste; D008372:Manure; D062611:Solid Waste; D000431:Ethanol; D008697:Methane
keywords: C/N ratio; Co-digestion; Continuous stirred tank reactor (CSTR); Cow manure; Sugar beet vinasse