title: Enhanced solid-state biogas production from lignocellulosic biomass by organosolv pretreatment.
abstract: Organosolv pretreatment was used to improve solid-state anaerobic digestion (SSAD) for methane production from three different lignocellulosic substrates (hardwood elm, softwood pine, and agricultural waste rice straw). Pretreatments were conducted at 150 and 180(°)C for 30 and 60 min using 75% ethanol solution as an organic solvent with addition of sulfuric acid as a catalyst. The statistical analyses showed that pretreatment temperature was the significant factor affecting methane production. Optimum temperature was 180(°)C for elmwood while it was 150(°)C for both pinewood and rice straw. Maximum methane production was 152.7, 93.7, and 71.4 liter per kg carbohydrates (CH), which showed up to 32, 73, and 84% enhancement for rice straw, elmwood, and pinewood, respectively, compared to those from the untreated substrates. An inverse relationship between the total methane yield and the lignin content of the substrates was observed. Kinetic analysis of the methane production showed that the process followed a first-order model for all untreated and pretreated lignocelluloses.
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Safoora
authors.initials: S
authors.lastname: Mirmohamadsadeghi
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran ; Industrial Biotechnology Group, Institute of Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Keikhosro
authors.identifier: 0000-0001-9030-956X
authors.initials: K
authors.lastname: Karimi
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Akram
authors.initials: A
authors.lastname: Zamani
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Hamid
authors.identifier: 0000-0003-3891-6471
authors.initials: H
authors.lastname: Amiri
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
authors.forename: Ilona Sárvári
authors.initials: IS
authors.lastname: Horváth
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D008031:Lignin / Q000378:metabolism*; D008697:Methane / Q000032:analysis
chemical_list: D056804:Biofuels; C036909:lignocellulose; D008031:Lignin; D008697:Methane