title: Agricultural residue valorization using a hydrothermal process for second generation bioethanol and oligosaccharides production.
abstract: In the present work, the hydrothermal valorization of an abundant agricultural residue has been studied in order to look for high added value applications by means of hydrothermal pretreatment followed by fed-batch simultaneous saccharification and fermentation, to obtain oligomers and sugars from autohydrolysis liquors and bioethanol from the solid phase. Non-isothermal autohydrolysis was applied to barley straw, leading to a solid phase with about a 90% of glucan and lignin and a liquid phase with up to 168 g kg(-1) raw material valuable hemicellulose-derived compounds. The solid phase showed a high enzymatic susceptibility (up to 95%). It was employed in the optimization study of the fed-batch simultaneous saccharification and fermentation, carried out at high solids loading, led up to 52 g ethanol/L (6.5% v/v).
authors.affiliation: Department of Chemical Engineering, Faculty of Science, University of Cordoba, Campus of Rabanales, Marie-Curie Building (C-3), N-IV Road, km. 396, 14071 Cordoba, Spain.
authors.forename: Fátima
authors.initials: F
authors.lastname: Vargas
authors.affiliation: Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain; CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain.
authors.forename: Elena
authors.initials: E
authors.lastname: Domínguez
authors.affiliation: Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain; CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Vila
authors.affiliation: Department of Chemical Engineering, Faculty of Science, University of Cordoba, Campus of Rabanales, Marie-Curie Building (C-3), N-IV Road, km. 396, 14071 Cordoba, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Rodríguez
authors.affiliation: Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain; CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain. Electronic address: gil@uvigo.es.
authors.forename: Gil
authors.initials: G
authors.lastname: Garrote
mesh_terms: D000383:Agriculture; D056804:Biofuels; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D006358:Hot Temperature; D009844:Oligosaccharides / Q000096:biosynthesis*
chemical_list: D056804:Biofuels; D009844:Oligosaccharides; D000431:Ethanol
keywords: Autohydrolysis; Barley straw; Bioethanol; Fed-batch simultaneous saccharification and fermentation; Oligosaccharides