Sugar cane bagasse as a possible source of fermentable carbohydrates. I. Characterization of bagasse with regard to monosaccharide, hemicellulose, and amino acid composition

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260260909· OSTI ID:6032339

du Toit, P J; Olivier, S P; van Biljon, P L

Hemicellulose fractions of plant materials have recently attracted attention as a possible source of fermentable sugars to be used via fermentation for the production of liquid fuels, mainly ethanol. Individual monosaccharides present in bagasse hemicellulose were determined using HPLC and other chromatographic procedures. The presence of higher oligomers of the monosaccharides could also be determined. The pentosan fraction of bagasse was successfully hydrolyzed and extracted with 5% (m/v) HCl, and the rate of release of individual monosaccharides was determined. Xylose was the main component in the hydrolyzates, while glucose, arabinose, and galactose present in the side chains of the pentosans were initially released at a fast rate. This treatment resulted in obtaining 229 mg/g xylose (85% of theoretical maximum) and 44 mg/g glucose from bagasse. Only arabinose (2.8 mg/g) and galactose (0.75 mg/g) was also present in detectable quantities. A total of 309 mg monosaccharides were obtained from 1 g of bagasse by this treatment. The results indicated that hydrolysis conditions for specific plant materials depend on the composition of the specific material being utilized. A part of the pentosan fraction (77.1%) was hydrolyzed at a high rate, while 22.9% was more stable and hydrolyzed more slowly. Although 39.8% dry bagasse could be obtained in solution by treatment with dilute alkali, only about 72% of the available hemicelluloses could be extracted in this way if the bagasse was not delignified beforehand. Amino acids and peptides or proteins were also extracted to very much the same extent with the alkali.

• Research Organization: Univ. of the Orange Free State, Republic of South Africa
• OSTI ID: 6032339
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 26:4; ISSN BIBIA
• Country of Publication: United States
• Language: English

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AGRICULTURAL WASTES
ALCOHOLS
AMINO ACIDS
BAGASSE
BIOSYNTHESIS
CARBOHYDRATES
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMATOGRAPHY
DECOMPOSITION
ETHANOL
HEMICELLULOSE
HYDROLYSIS
HYDROXY COMPOUNDS
LIQUID COLUMN CHROMATOGRAPHY
LYSIS
MONOSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC WASTES
POLYSACCHARIDES
RECOVERY
RESOURCE POTENTIAL
SACCHARIDES
SEPARATION PROCESSES
SOLVOLYSIS
SYNTHESIS
WASTES