Ethanol inhibition kinetics of Kluyveromyces marxianus grown on Jerusalem artichoke juice

Journal Article · Wed Dec 01 00:00:00 EST 1982 · Appl. Environ. Microbiol.; (United States)

OSTI ID:6247405

Bajpai, P; Margaritis, A

The kinetics of ethanol inhibition on cell growth and ethanol production by Kluyveromyces marxianus UCD (FST) 55-82 were studied during batch growth. The liquid medium contained 10% (weight/volume) inulin-type sugars derived from an extract of Jerusalem artichoke (Helianthus tuberosus) tubers, supplemented with small amounts of Tween 80, oleic acid, and corn steep liquor. Initial ethanol concentrations ranging from 0 to 80 g/liter in the liquid medium were used to study the inhibitory effect of ethanol on the following parameters: maximum specific growth rate (mu max), cell and ethanol yields, and sugar utilization. It was found that as the initial ethanol concentration increased from 0 to 80 g/liter, and maximum specific growth rate of K. marxianus cells decreased from 0.42 to 0.09/hour, whereas the ethanol and cell yields and sugar utilization remained almost constant. A simple kinetic model was used to correlate the mu max results and the rates of cell and ethanol production, and the appropriate constants were evaluated. (Refs. 22).

• Research Organization: Chemical and Biochemical Engineering, Faculty of Engineering Science, The Univ of Western Ontario, London, Ontario N6A 5B9, Canada
• OSTI ID: 6247405
• Journal Information: Appl. Environ. Microbiol.; (United States), Vol. 44:6
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
59 BASIC BIOLOGICAL SCIENCES
ETHANOL
BIOLOGICAL EFFECTS
BIOSYNTHESIS
FERMENTATION
INHIBITION
YEASTS
KINETICS
SACCHARIDES
TUBERS
ALCOHOLS
BIOCONVERSION
CARBOHYDRATES
FUNGI
HYDROXY COMPOUNDS
MICROORGANISMS
ORGANIC COMPOUNDS
PLANTS
SYNTHESIS
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