title: Evaluation of hydrogen and methane production from sugarcane bagasse hemicellulose hydrolysates by two-stage anaerobic digestion process.
abstract: This study aimed at optimizing the net energy recovery from hydrogen and methane production through anaerobic digestion of the hemicellulose hydrolysate (HH) obtained by desirable conditions (DC) of autohydrolysis pretreatment (AH) of sugarcane bagasse (SB). Anaerobic digestion was carried out in a two-stage (acidogenic-methanogenic) batch system where the acidogenic phase worked as a hydrolysis and biodetoxification step. This allowed the utilization of more severe AH pretreatment conditions, i.e. T=178.6°C and t=55min (DC3) and T=182.9°C and t=40.71min (DC4). Such severe conditions resulted in higher extraction of hemicelluloses from SB (DC1=68.07%, DC2=48.99%, DC3=77.40% and DC4=73.90%), which consequently improved the net energy balance of the proposed process. The estimated energy from the combustion of both biogases (H2 and CH4) accumulated during the two-stage anaerobic digestion of HH generated by DC4 condition was capable of producing a net energy of 3.15MJ·kgSB(-1)dry weight.
authors.affiliation: Laboratório de Química Tecnológica e Ambiental, Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil. Electronic address: brunobaeta@iceb.ufop.br.
authors.forename: Bruno Eduardo Lobo
authors.initials: BE
authors.lastname: Baêta
authors.affiliation: Laboratório de Química Tecnológica e Ambiental, Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Diego Roberto Sousa
authors.initials: DR
authors.lastname: Lima
authors.affiliation: Laboratório de Química Tecnológica e Ambiental, Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: José Gabriel Balena
authors.initials: JG
authors.lastname: Filho
authors.affiliation: Laboratório de Química Tecnológica e Ambiental, Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Oscar Fernando Herrera
authors.initials: OF
authors.lastname: Adarme
authors.affiliation: Laboratório de Química Tecnológica e Ambiental, Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Leandro Vinícius Alves
authors.initials: LV
authors.lastname: Gurgel
authors.affiliation: Laboratório de Química Tecnológica e Ambiental, Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Sérgio Francisco de
authors.initials: SF
authors.lastname: Aquino
mesh_terms: D056804:Biofuels; D002482:Cellulose / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D006868:Hydrolysis; D007700:Kinetics; D008697:Methane / Q000096:biosynthesis*; D011134:Polysaccharides / Q000737:chemistry*; D031786:Saccharum / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics
chemical_list: D056804:Biofuels; D011134:Polysaccharides; D000431:Ethanol; D006859:Hydrogen; C007916:hemicellulose; D002482:Cellulose; C027433:bagasse; D008697:Methane
keywords: Autohydrolysis pretreatment; Hemicellulose hydrolysate; Hydrogen; Methane; Sugarcane bagasse; Two-stage anaerobic digestion