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Ethanol production from cotton-based waste textiles
University of Borås, School of Engineering.
University of Borås, School of Engineering.ORCID iD: 0000-0003-4887-2433
2009 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 100, no 2, 1007-1010 p.Article in journal (Refereed) Published
Abstract [en]

Ethanol production from cotton linter and waste of blue jeans textiles was investigated. In the best case, alkali pretreatment followed by enzymatic hydrolysis resulted in almost complete conversion of the cotton and jeans to glucose, which was then fermented by Saccharomyces cerevisiae to ethanol. If no pretreatment applied, hydrolyses of the textiles by cellulase and P-glucosidase for 24 h followed by simultaneous saccharification and fermentation (SSF) in 4 days, resulted in 0.140-0.145 g ethanol/g textiles, which was 25-26% of the corresponding theoretical yield. A pretreatment with concentrated phosphoric acid prior to the hydrolysis improved ethanol production from the textiles up to 66% of the theoretical yield. However, the best results obtained from alkali pretreatment of the materials by NaOH. The alkaline pretreatment of cotton fibers were carried out with 0-20% NaOH at 0 degrees C, 23 degrees C and 100 degrees C, followed by enzymatic hydrolysis up to 4 days. In general, higher concentration of NaOH resulted in a better yield of the hydrolysis, whereas temperature had a reverse effect and better results were obtained at lower temperature. The best conditions for the alkali pretreatment of the cotton were obtained in this study at 12% NaOH and 0 degrees C and 3 h. In this condition, the materials with 3% solid content were enzymatically hydrolyzed at 85.1% of the theoretical yield in 24 h and 99.1% in 4 days. The alkali pretreatment of the waste textiles at these conditions and subsequent SSF resulted in 0.48 g ethanol/g pretreated textiles used. (c) 2008 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
Elsevier BV , 2009. Vol. 100, no 2, 1007-1010 p.
Keyword [en]
chitin, glucosamine, ethanol, biomass, biogas, lignocelluloses, baker's yeast, saccharomyces, cerevisiae, encapsulation, flocculation, superabsorbents, chitosan, zygomycetes, mucor, rhizopus, rhizomucor, MTBE, biopolymers, furfural, acetic acid, HMF, fed-batch, continuous cultivation, immobilization, denitrification, activated sludge, bread, orange peels, citrus, waste, keratin, methyl tertiary butyl ether
Keyword [sv]
Energi och material
National Category
Other Industrial Biotechnology
Identifiers
URN: urn:nbn:se:hb:diva-2568DOI: 10.1016/j.biortech.2008.07.020Local ID: 2320/4647OAI: oai:DiVA.org:hb-2568DiVA: diva2:870662
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2016-05-10Bibliographically approved

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