title: Innovative pretreatment strategies for biogas production.
abstract: Biogas or biomethane is traditionally produced via anaerobic digestion, or recently by thermochemical or a combination of thermochemical and biological processes via syngas (CO and H2) fermentation. However, many of the feedstocks have recalcitrant structure and are difficult to digest (e.g., lignocelluloses or keratins), or they have toxic compounds (such as fruit flavors or high ammonia content), or not digestible at all (e.g., plastics). To overcome these challenges, innovative strategies for enhanced and economically favorable biogas production were proposed in this review. The strategies considered are commonly known physical pretreatment, rapid decompression, autohydrolysis, acid- or alkali pretreatments, solvents (e.g. for lignin or cellulose) pretreatments or leaching, supercritical, oxidative or biological pretreatments, as well as combined gasification and fermentation, integrated biogas production and pretreatment, innovative biogas digester design, co-digestion, and bio-augmentation.
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden.
authors.forename: Regina J
authors.initials: RJ
authors.lastname: Patinvoh
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden.
authors.forename: Osagie A
authors.initials: OA
authors.lastname: Osadolor
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Chandolias
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden.
authors.forename: Ilona
authors.initials: I
authors.lastname: Sárvári Horváth
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden. Electronic address: Mohammad.Taherzadeh@hb.se.
authors.forename: Mohammad J
authors.initials: MJ
authors.lastname: Taherzadeh
mesh_terms: D000641:Ammonia; D056804:Biofuels; D002482:Cellulose / Q000737:chemistry; D003246:Conservation of Energy Resources; D005285:Fermentation; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*
chemical_list: D056804:Biofuels; C036909:lignocellulose; D000641:Ammonia; D002482:Cellulose; D008031:Lignin
keywords: Biogas; Fruit and food waste; Keratin waste; Lignocellulosic residue; Pretreatment strategies; Syngas