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Fractionation of the main components of barley spent grains from a microbrewery
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2011 (English)In: Cellulose Chemistry and Technology, ISSN 0576-9787, Vol. 45, no 5-6, 339-345 p.Article in journal (Refereed) Published
Sustainable development
The content falls within the scope of Sustainable Development
Abstract [en]

The chemical composition of barley spent grains generated in a microbrewery and their fractionation by acid hydrolysis and delignification were investigated. The material contained high amount of carbohydrates (60%), while its lignin content was lower than that reported for other sorts of barley spent grains. Different dilute-acid hydrolysis methods were evaluated for separating the main components of the spent grains, without affecting the sugars generated by starch hydrolysis. The utilization of a two-step dilute-acid hydrolysis approach allowed to hydrolyse starch in a first step, at 100 ºC, and hemicelluloses in a second step, at 121 ºC. Acetosolv and alkaline delignification were used for solubilising the lignin fraction. A higher lignin solubilisation (95% of the lignin contained in the raw material) was achieved after alkaline delignification, whereas only 34% of the initial lignin was removed by direct acetosolv. When the acetosolv treatment was combined with acid hydrolysis, lignin solubilisation increased to 74%. Lignin was precipitated from the liquors at recovery rates from 40 to 93%, as depending on the hydrolysis/delignification method used.

Place, publisher, year, edition, pages
2011. Vol. 45, no 5-6, 339-345 p.
Keyword [en]
barley spent grains, acid hydrolysis, alkaline delignification, acetosolv, Resursåtervinning
National Category
Industrial Biotechnology Chemical Engineering
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-3139Local ID: 2320/8614OAI: oai:DiVA.org:hb-3139DiVA: diva2:871235
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2016-07-15Bibliographically approved

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http://www.cellulosechemtechnol.ro/pdf/CCT45,5-6%282011%29/p.339-345.pdf

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Taherzadeh, Mohammad J.
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CiteExportLink to record
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Citation style
  • apa
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  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
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