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Chemical characterisation and dilute-acid hydrolysis of rice hulls from an artisan mill
University of Borås, School of Engineering.ORCID iD: 0000-0003-4887-2433
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2010 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 5, no 4, 2268-2277 p.Article in journal (Refereed) Published
Abstract [en]

The chemical composition of rice hulls produced in an artisan mill and its conversion to fermentable sugars was investigated. The carbohydrate fraction represented 59.2% (w/w) of the dry hulls. Cellulose, with 36.6%, was the main component, followed by xylan with 13.9%. An important contribution of starch (8.7%) was also detected. The content of ash (19.6%) and lignin (15.5%) was comparable with that of rice hulls obtained in industrial mills. Dilute-sulphuric acid hydrolysis at different temperatures, from 160 to 210°C, was evaluated for production of fermentable sugars. Due to starch hydrolysis, the concentration of glucose in the hydrolysates produced at 160°C was higher than the values that have previously been reported for industrial sorts of rice hulls under comparable conditions. The xylan-to-xylose conversion increased steadily with increase of the temperature and reached a maximum (67.7%) at 190°C. Further increases of the hydrolysis temperature decreased the yield of sugars due to their dehydration to furfural and HMF.

Place, publisher, year, edition, pages
North Carolina State University , 2010. Vol. 5, no 4, 2268-2277 p.
Keyword [sv]
Energi och material
National Category
Industrial Biotechnology
Identifiers
URN: urn:nbn:se:hb:diva-2861Local ID: 2320/6954OAI: oai:DiVA.org:hb-2861DiVA: diva2:870955
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2016-09-28Bibliographically approved

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http://www.ncsu.edu/bioresources/BioRes_05/BioRes_05_4_2268_Lopez_GKTM_Chem_Char_DiluteAc_Hydrol_Rice_Hulls_Artisan_1074.pdf

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