title: Effects of enzymatic hydrolysis and ultrasounds pretreatments on corn cob and vine trimming shoots for biogas production.
abstract: Due to their lignocellulosic nature, corn cob and vine trimming shoots (VTS) could be valorized by anaerobic digestion for biogas production. To enhance the digestibility of substrates, pretreatments of lignocellulosic materials are recommended. The effect of enzymatic hydrolysis, ultrasounds pretreatments (US) and the combination of both was assayed in lignocellulosic composition, methane, and biogas yields. The pretreatments leaded to a reduction in lignin and an increase in neutral detergent soluble compounds making corn cob and VTS more amendable for biogas conversion. The US were negative for biogas production from both substrates and in particular strongly detrimental for VTS. On the opposite side, the enzymatic hydrolysis was certainly beneficial increasing 59.8% and 14.6% the methane production from VTS and corn cob, respectively. The prior application of US did not potentiate (or not sufficiently) the improvement in the methane production reflected by the enzymatic hydrolysis pretreatment of VTS and corn cob.
authors.affiliation: Department of Chemical Engineering, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, Spain; Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain. Electronic address: noelia@uvigo.es.
authors.forename: N
authors.initials: N
authors.lastname: Pérez-Rodríguez
authors.affiliation: Halle de Biotechnologie de l'Environnement, Laboratoire de Biotechnologie de l'Environnement (LBE), INRA, Parc Méditerranéen de l'Innovation, 11 100 Narbonne, France. Electronic address: diana.garcia-bernet@supagro.inra.fr.
authors.forename: D
authors.initials: D
authors.lastname: García-Bernet
authors.affiliation: Department of Chemical Engineering, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, Spain; Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain. Electronic address: jmanuel@uvigo.es.
authors.forename: J M
authors.initials: JM
authors.lastname: Domínguez
mesh_terms: D056804:Biofuels; D019220:High-Energy Shock Waves; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry; D008697:Methane / Q000096:biosynthesis; D059027:Recycling / Q000379:methods*; D012037:Refuse Disposal / Q000379:methods*; D014465:Ultrasonics / Q000379:methods; D003313:Zea mays / Q000737:chemistry*
chemical_list: D056804:Biofuels; D008031:Lignin; D008697:Methane
keywords: Agro-industrial wastes; Anaerobic digestion; Biogas; Enzymatic hydrolysis; Ultrasounds