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Title: Aerobic fermentation of D-xylose to ethanol by Clavispora sp

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Western Ontario, London
OSTI Identifier:
5597250
Resource Type:
Journal Article
Journal Name:
Appl. Environ. Microbiol.; (United States)
Additional Journal Information:
Journal Volume: 50:4
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; ETHANOL; BIOSYNTHESIS; XYLOSE; FERMENTATION; YEASTS; PRODUCTIVITY; AEROBIC CONDITIONS; CHEMICAL REACTION YIELD; ALCOHOLS; ALDEHYDES; BIOCONVERSION; CARBOHYDRATES; FUNGI; HYDROXY COMPOUNDS; MICROORGANISMS; MONOSACCHARIDES; ORGANIC COMPOUNDS; PENTOSES; PLANTS; SACCHARIDES; SYNTHESIS; YIELDS; 090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989); 550700 - Microbiology; 140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)

Citation Formats

Nigam, J N, Margaritis, A, and Lachance, M A. Aerobic fermentation of D-xylose to ethanol by Clavispora sp. United States: N. p., 1985. Web.
Nigam, J N, Margaritis, A, & Lachance, M A. Aerobic fermentation of D-xylose to ethanol by Clavispora sp. United States.
Nigam, J N, Margaritis, A, and Lachance, M A. Tue . "Aerobic fermentation of D-xylose to ethanol by Clavispora sp". United States.
@article{osti_5597250,
title = {Aerobic fermentation of D-xylose to ethanol by Clavispora sp},
author = {Nigam, J N and Margaritis, A and Lachance, M A},
abstractNote = {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.},
doi = {},
journal = {Appl. Environ. Microbiol.; (United States)},
number = ,
volume = 50:4,
place = {United States},
year = {1985},
month = {10}
}