Aerobic fermentation of D-xylose to ethanol by Clavispora sp

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · Appl. Environ. Microbiol.; (United States)

OSTI ID:5597250

Nigam, J N; Margaritis, A; Lachance, M A

Eleven strains of an undescribed species of Clavispora fermented D-xylose directly to ethanol under aerobic conditions. Strain UWO(PS)83-877-1 was grown in a medium containing 2% D-xylose and 0.5% yeast extract and the following results were obtained: ethanol yield coefficient (ethanol/D-xylose), 0.29 g/g (57.4% of theoretical); cell yield coefficient (dry biomass/D-xylose), 0.25 g/g; maximum ethanol concentration, 5.9 g/liter; maximum volumetric ethanol productivity, 0.11 g/liter/hour. With initial D-xylose concentrations of 40, 60, and 80 g/liter, maximum ethanol concentrations of 8.8, 10.9, and 9.8 g/liter were obtained, respectively (57.2, 57.1 and 48.3% of theoretical). Ethanol was found to inhibit the fermentation of D-xylose (Kp = 0.58 g/liter) more than the fermentation of glucose (Kp = 6.5 g/liter). The performance of this yeast compared favourably with that reported for some other D-xylose-fermenting yeasts.

• Research Organization: Univ. of Western Ontario, London
• OSTI ID: 5597250
• Journal Information: Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 50:4; ISSN AEMID
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
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59 BASIC BIOLOGICAL SCIENCES
AEROBIC CONDITIONS
ALCOHOLS
ALDEHYDES
BIOCONVERSION
BIOSYNTHESIS
CARBOHYDRATES
CHEMICAL REACTION YIELD
ETHANOL
FERMENTATION
FUNGI
HYDROXY COMPOUNDS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
PLANTS
PRODUCTIVITY
SACCHARIDES
SYNTHESIS
XYLOSE
YEASTS
YIELDS