Studies on the simultaneous enzymatic isomerization and yeast fermentation of D-xylose

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5149518

Roman de Rodriguez Ganduglia, G.N.

The addition of the enzyme D-xylose isomerase (glucose isomerase) to fermentation medium facilitates the conversion of D-xylose into ethanol by a two step process in which D-xylose is first isomerized to D-xylose, which is in turn converted to ethanol by yeast. Detailed kinetic studies were conducted independently for the isomerization reaction and for the fermentation of D-xylose by the yeast Schizosaccharomyces pombe. The kinetics of the isomerization reaction has been examined using a differential batch reactor at different temperatures and pH value. The kinetics of the utilization of D-xylose by the yeast Schizosaccharomyces pombe has been examined in presence of D-xylose and ethanol under anaerobic batch conditions. The effects of the concentration of each of the two sugars upon the production of ethanol were also examined. A combined model has been formulated that predicts the performance of the batch conversion of D-xylose to ethanol by the simultaneous isomerization/fermentation process. A reasonable agreement was found between experimental data and values calculated from the model.

• Research Organization: Purdue Univ., Lafayette, IN (USA)
• OSTI ID: 5149518
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
ETHANOL
BIOSYNTHESIS
SACCHAROMYCES
BIOCHEMICAL REACTION KINETICS
XYLOSE
FERMENTATION
ISOMERIZATION
ISOMERASES
MATHEMATICAL MODELS
ALCOHOLS
ALDEHYDES
BIOCONVERSION
CARBOHYDRATES
CHEMICAL REACTIONS
ENZYMES
FUNGI
HYDROXY COMPOUNDS
KINETICS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
PLANTS
REACTION KINETICS
SACCHARIDES
SYNTHESIS
YEASTS
550700* - Microbiology