title: Chemical characterization and hydrothermal pretreatment of Salicornia bigelovii straw for enhanced enzymatic hydrolysis and bioethanol potential.
abstract: Salicornia bigelovii straw was characterized and evaluated as a potential lignocellulosic bioethanol feedstock. S. bigelovii used in the study was grown in the United Arab Emirates using saltwater (40ppt) for irrigation. Salt removal was performed prior to pretreatment to protect the processing equipment and avoid inhibition of enzymes and yeast. Composition of the washed biomass was comparable to traditional lignocellulosic biomasses with relatively high glucan and xylan content (26 and 22g/100gDM, respectively) but with lower lignin content (7g/100gDM). The washed feedstock was subjected to hydrothermal pretreatment, producing highly digestible (up to 92% glucan-to-glucose conversion) and fermentable (up to 100% glucose-to-ethanol conversion) fiber fractions. Liquid fractions obtained in the pretreatment did not show inhibition towards Saccharomyces cerevisiae. No significant differences among the enzymatic convertibility and microbial fermentability of the fibers as well as low xylose recoveries suggest that lower severity pretreatment conditions could be exploited for S. bigelovii.
authors.affiliation: Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Iwona
authors.initials: I
authors.lastname: Cybulska
authors.affiliation: Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Tanmay
authors.initials: T
authors.lastname: Chaturvedi
authors.affiliation: Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Grzegorz P
authors.initials: GP
authors.lastname: Brudecki
authors.affiliation: Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
authors.forename: Zsófia
authors.initials: Z
authors.lastname: Kádár
authors.affiliation: Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
authors.forename: Anne S
authors.initials: AS
authors.lastname: Meyer
authors.affiliation: Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Baldwin
authors.affiliation: Masdar Institute of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates. Electronic address: mthomsen@masdar.ac.ae.
authors.forename: Mette Hedegaard
authors.initials: MH
authors.lastname: Thomsen
mesh_terms: D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism / Q000187:drug effects; D002480:Cellulase / Q000378:metabolism*; D019663:Chenopodiaceae / Q000187:drug effects / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects; D006868:Hydrolysis / Q000187:drug effects; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000378:metabolism; D013696:Temperature; D014867:Water / Q000494:pharmacology*; D014994:Xylose / Q000378:metabolism
chemical_list: D056804:Biofuels; D014867:Water; D000431:Ethanol; D014994:Xylose; D002480:Cellulase
keywords: Bioethanol; Enzymatic hydrolysis; Halophytes; Hydrothermal pretreatment; Saccharomyces cerevisiae