Evaluation of Alkali-Pretreated Soybean Straw for Lignocellulosic Bioethanol Production
Author
Source
International Journal of Polymer Science
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-05-03
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Soybean straw is a renewable resource in agricultural residues that can be used for lignocellulosic bioethanol production.
To enhance enzymatic digestibility and fermentability, the biomass was prepared with an alkali-thermal pretreatment (sodium hydroxide, 121°C, 60 min).
The delignification yield was 34.1~53%, in proportion to the amount of sodium hydroxide, from 0.5 to 3.0 M.
The lignin and hemicellulose contents of the pretreated biomass were reduced by the pretreatment process, whereas the proportion of cellulose was increased.
Under optimal condition, the pretreated biomass consisted of 74.0±0.1% cellulose, 10.3±0.1% hemicellulose, and 10.1±0.6% lignin.
During enzymatic saccharification using Cellic® CTec2 cellulase, 10% (w/v) of pretreated soybean straw was hydrolyzed completely and converted to 67.3±2.1 g/L glucose and 9.4±0.5 g/L xylose with a 90.9% yield efficiency.
Simultaneous saccharification and fermentation of the pretreated biomass by Saccharomyces cerevisiae W303-1A produced 30.5±1.2 g/L ethanol in 0.5 L fermented medium containing 10% (w/v) pretreated biomass after 72 h.
The ethanol productivity was 0.305 g ethanol/g dry biomass and 0.45 g ethanol/g glucose after fermentation, with a low concentration of organic acid metabolites.
Also, 82% of fermentable sugar was used by the yeast for ethanol fermentation.
These results show that the combination of alkaline pretreatment and biomass hydrolysate is useful for enhancing bioethanol productivity using delignified soybean straw.
American Psychological Association (APA)
Kim, Seonghun. 2018. Evaluation of Alkali-Pretreated Soybean Straw for Lignocellulosic Bioethanol Production. International Journal of Polymer Science،Vol. 2018, no. 2018, pp.1-7.
https://search.emarefa.net/detail/BIM-1175166
Modern Language Association (MLA)
Kim, Seonghun. Evaluation of Alkali-Pretreated Soybean Straw for Lignocellulosic Bioethanol Production. International Journal of Polymer Science No. 2018 (2018), pp.1-7.
https://search.emarefa.net/detail/BIM-1175166
American Medical Association (AMA)
Kim, Seonghun. Evaluation of Alkali-Pretreated Soybean Straw for Lignocellulosic Bioethanol Production. International Journal of Polymer Science. 2018. Vol. 2018, no. 2018, pp.1-7.
https://search.emarefa.net/detail/BIM-1175166
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1175166