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Kinetic study of detoxification of dilute-acid hydrolyzates by Ca(OH) 2
Dept. Chem. Eng. and Environ. Sci., Chalmers University of Technology.
Dept. Chem. Eng. and Environ. Sci., Chalmers University of Technology.
Dept. Chem. Eng. and Environ. Sci., Chalmers University of Technology.ORCID iD: 0000-0003-4887-2433
2004 (English)In: Journal of Biotechnology, ISSN 0168-1656, E-ISSN 1873-4863, Vol. 114, no 1-2, p. 187-198Article in journal (Refereed) Published
Sustainable development
In my opinion, the content of this publication falls within the area of sustainable development.
Abstract [en]

Detoxification of dilute-acid hydrolyzates by addition of Ca(OH) 2 (overliming) and cultivation of the detoxified hydrolyzates by Saccharomyces cerevisiae were examined. The examined overliming involves increasing the pH of the hydrolyzates to 9, 10, 11 or 12, keeping up to 90 min at different temperatures of 30, 45 and 60°C, followed by readjustment of the pH to 5. Increasing the pH, time and/or temperature resulted in more effective degradation of furans and resulted in better fermentability for both of the tested hydrolyzates, but higher loss of the sugars was observed as well. Overliming of glucose and furfural solution at pH 12 showed a rapid decrease in concentration of these chemicals followed by a slow degradation process. Therefore, a kinetic model was proposed for the detoxification, where the sugars or furans make transient complexes with calcium ions and this complex will then be converted to the degradation product. The ANOVA analysis of the model resulted in an average R 2 of 0.99 for the model fitted to all the experimental data points.

Place, publisher, year, edition, pages
2004. Vol. 114, no 1-2, p. 187-198
Keywords [en]
Detoxification, Fermentation, Kinetic modeling, Lignocellulosic hydrolyzates, Overliming, Saccharomyces cerevisiae
National Category
Industrial Biotechnology
Identifiers
URN: urn:nbn:se:hb:diva-14839DOI: 10.1016/j.jbiotec.2004.07.006ISI: 000224598000020PubMedID: 15464612Scopus ID: 2-s2.0-4644321560ISBN: 01681656 (ISSN) OAI: oai:DiVA.org:hb-14839DiVA, id: diva2:1236413
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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