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Optimization study of citrus wastes Saccharification by dilute acid hydrolysis
University of Borås, School of Engineering.
University of Borås, School of Engineering.
University of Borås, School of Engineering.ORCID iD: 0000-0003-4887-2433
University of Borås, School of Engineering.
2008 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 3, no 1, 108-122 p.Article in journal (Refereed) Published
Abstract [en]

Optimization study of citrus wastes Saccharification by dilute acid hydrolysis

Abstract [en]

Optimization study of citrus wastes Saccharification by dilute acid hydrolysis

Abstract [en]

The effects of time, acid concentration, temperature and solid concentration on dilute-acid hydrolysis of orange peels were investigated. A central composite rotatable experimental design (CCRD) was applied to study the individual effects of these hydrolysis factors and also their interdependence effects. The enzymatic hydrolysis of the peels by cellulase, beta-glucosidase, and pectinase enzymes resulted in 72% dissolution of the peels, including 18.7% galacturonic acid and 53.3% of a total of glucose, fructose, galactose, and arabinose. Dilute-acid hydrolysis up to 210 C was not able to hydrolyze pectin to galacturonic acid. However, the sugar polymers were hydrolyzed at relatively low temperature. The optimum results were obtained at 116 degrees C, 0.5% sulfuric acid concentration, 6% solid fraction, and 12.9 min retention time. Under these conditions, the total sugars obtained at 41.8% dry peels and 2.6% of total hexose sugars were further degraded to hydroxymethylfurfural (HMF). No furfural was detected through these experiments from decomposition of pentoses.

Place, publisher, year, edition, pages
North Carolina State University , 2008. Vol. 3, no 1, 108-122 p.
Keyword [en]
orange peels, dilute-acid hydrolysis, experimental design, suger optimization
Keyword [sv]
Energi och material
National Category
Other Industrial Biotechnology
Identifiers
URN: urn:nbn:se:hb:diva-2410Local ID: 2320/3559OAI: oai:DiVA.org:hb-2410DiVA: diva2:870504
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2016-09-29Bibliographically approved

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Talebnia, FaridPourbafrani, MohammadTaherzadeh, Mohammad J.Lundin, Magnus
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