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Effect of Steam Explosion on the Structural Modification of Rice Straw for Enhanced Biodegradation and Biogas Production
University of Borås, Faculty of Textiles, Engineering and Business.
Department of Biosystem Mechanical Engineering, Islamic Azad University Tehran Science and Research Branch.
Iranian Research Organizations for Science and Technology (IROST).
Department of Mechanical and Aerospace Engineering, Islamic Azad University Tehran Science and Research Branch.
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2019 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 14, no 1, p. 464-485Article in journal (Refereed) Published
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]

The goal of this study was to develop an operational steam explosion pretreatment for effective modification of rice straw chemical structure in order to improve its biodegradability and methane yield. The parameters of pressure (5 bar to 15 bar), moisture (0% to 70%), and time (1 min to 15 min) were studied in steam explosion pretreatment. The steam explosion efficiency was investigated according to the changes in crystallinity structure and chemical composition on rice straw, as well as the methane yield from straw. Steam explosion changed the structure linkages between the lignin and carbohydrate, which was indicated by a reduction in the peak intensities in the bonds from 1648 cm(-1) to 1516 cm(-1). After pretreatment, the crystallinity index of the rice straw in the 10 bar-10 min cycle with no moisture and 15 bar-10 min cycle with 70% moisture increased from 22.9% to 28.3% and 28.6%, respectively. Steam explosion efficiently decreased the lignin. The highest reduction in the amount of lignin was observed with the 10 bar-10 min cycle, which reached from 18.6% to 13.0%. The methane yield increased with the cycles 10 bar-10 min and 15 bar-15 min with 35% moisture, and 15 bar-10 min with 70% moisture by 113%, 104%, and 147% compared to that of the untreated straw, respectively. Moreover, the highest biodegradation percent of the rice straw was obtained in these cycles.

Place, publisher, year, edition, pages
2019. Vol. 14, no 1, p. 464-485
National Category
Industrial Biotechnology
Research subject
Resource Recovery; Resource Recovery; Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-21534DOI: 10.15376/biores.14.1.464-485ISI: 000459494400036Scopus ID: 2-s2.0-85061308044OAI: oai:DiVA.org:hb-21534DiVA, id: diva2:1340803
Available from: 2019-08-06 Created: 2019-08-06 Last updated: 2019-08-07

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Aski, Abolfazl LotfiTaherzadeh, Mohammad J

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2021222324252623 of 219
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