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Production of bioethanol and value added compounds from wheat straw through combined alkaline/alkaline-peroxide pretreatment.
- Source :
-
Bioresource technology [Bioresour Technol] 2018 Jul; Vol. 259, pp. 228-236. Date of Electronic Publication: 2018 Mar 13. - Publication Year :
- 2018
-
Abstract
- An efficient scheme was developed for the conversion of wheat straw (WS) into bioethanol, silica and lignin. WS was pre-extracted with 0.2 mol/L sodium hydroxide at 30 °C for 5 h to remove about 91% of initial silica. Subsequently, the alkaline-pretreated solids were subjected to alkaline hydrogen peroxide (AHP) pretreatment with 40 mg hydrogen peroxide (H <subscript>2</subscript> O <subscript>2</subscript> )/g biomass at 50 °C for 7 h to prepare highly digestible substrate. The results of enzymatic hydrolysis demonstrated that the sequential alkaline-AHP pretreated WS was efficiently hydrolyzed at 10% (w/v) solids loading using an enzyme dosage of 10 mg protein/g glucan. The total sugar conversion of 92.4% was achieved. Simultaneous saccharification and co-fermentation (SSCF) was applied to produce ethanol from the two-stage pretreated substrate using Saccharomyces cerevisiae SR8u strain. Ethanol with concentration of 31.1 g/L was produced. Through the proposed process, about 86.4% and 54.1% of the initial silica and lignin were recovered, respectively.<br /> (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Subjects :
- Ethanol
Fermentation
Hydrolysis
Hydrogen Peroxide
Lignin
Triticum
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 259
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 29567594
- Full Text :
- https://doi.org/10.1016/j.biortech.2018.03.044