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Grape marc as a source of carbohydrates for bioethanol: Chemical composition, pre-treatment and saccharification.
University of Adelaide, Australia.ORCID iD: 0000-0002-0968-5793
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2015 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 193, p. 76-83, article id S0960-8524(15)00816-0Article in journal (Refereed) Published
Abstract [en]

Global grape production could generate up to 13 Mt/yr of wasted biomass. The compositions of Cabernet Sauvignon (red marc) and Sauvignon Blanc (white marc) were analyzed with a view to using marc as raw material for biofuel production. On a dry weight basis, 31-54% w/w of the grape marc consisted of carbohydrate, of which 47-80% was soluble in aqueous media. Ethanol insoluble residues consisted mainly of polyphenols, pectic polysaccharides, heteroxylans and cellulose. Acid and thermal pre-treatments were investigated for their effects on subsequent cellulose saccharification. A 0.5M sulfuric acid pre-treatment yielded a 10% increase in the amount of liberated glucose after enzymatic saccharification. The theoretical amount of bioethanol that could be produced by fermentation of grape marc was up to 400 L/t. However, bioethanol from only soluble carbohydrates could yield 270 L/t, leaving a polyphenol enriched fraction that may be used in animal feed or as fertilizer.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 193, p. 76-83, article id S0960-8524(15)00816-0
Keywords [en]
Bioethanol, Grape marc, Polysaccharide, Pre-treatment, Saccharification
National Category
Renewable Bioenergy Research
Identifiers
URN: urn:nbn:se:kth:diva-211520DOI: 10.1016/j.biortech.2015.06.030ISI: 000358380900010PubMedID: 26117238Scopus ID: 2-s2.0-84935038115OAI: oai:DiVA.org:kth-211520DiVA, id: diva2:1129713
Note

QC 20170807

Available from: 2017-08-06 Created: 2017-08-06 Last updated: 2018-01-13Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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