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Ethanol production from dilute-acid pretreated rice straw by simultaneous saccharification and fermentation with Mucor indicus, Rhizopus oryzae, and Saccharomyces cerevisiae
Chemical Engineering Department, Isfahan University of Technology, Isfahan.
Department of Biology, Isfahan University.
University of Borås, Faculty of Textiles, Engineering and Business.ORCID iD: 0000-0003-4887-2433
2006 (English)In: Enzyme and microbial technology, ISSN 0141-0229, E-ISSN 1879-0909, Vol. 40, no 1, p. 138-144Article in journal (Refereed) Published
Sustainable development
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Abstract [en]

Ethanol production from rice straw by simultaneous saccharification and fermentation (SSF) with Mucor indicus, Rhizopus oryzae, and Saccharomyces cerevisiae was investigated and compared with pure cellulose, Avicel, as a reference. The straw was pretreated with dilute-acid hydrolysis. The SSF experiments were carried out aerobically and anaerobically at 38 °C, 50 g/l dry matter (DM) solid substrate concentration and 15 or 30 filter paper unit (FPU)/g DM of a commercial cellulase. The experiments were ended after 7 days, while an average of 2-3 days were usually enough to achieve the maximum ethanol yield. All the strains were able to produce ethanol from the pretreated rice straw with an overall yield of 40-74% of the maximum theoretical SSF yield, based on the glucan available in the solid substrate. R. oryzae had the best ethanol yield as 74% from rice straw followed by M. indicus with an overall yield of 68% with 15 FPU/g DM of cellulase. Glycerol was the main byproduct of the SSF by M. indicus and S. cerevisiae with yields 117 and 90 mg/g of equivalent glucose in the pretreated straw, respectively, while R. oryzae produced lactic acid as the major byproduct with yield 60 mg/g glucose equivalent in pretreated rice straw under anaerobic conditions. 

Place, publisher, year, edition, pages
2006. Vol. 40, no 1, p. 138-144
Keywords [en]
Dilute-acid hydrolysis, Ethanol, Mucor indicus, Rhizopus oryzae, Rice straw, Saccharomyces cerevisiae, Simultaneous saccharification and fermentation
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-14819DOI: 10.1016/j.enzmictec.2005.10.046ISI: 000241711900024Scopus ID: 2-s2.0-33749658794ISBN: 01410229 (ISSN) OAI: oai:DiVA.org:hb-14819DiVA, id: diva2:1236498
Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-08Bibliographically approved

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Taherzadeh, Mohammad J

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