Ethanol effects on the kinetics of a continuous fermentation with saccharomyces cerevisiae

Conference · Sat Nov 01 00:00:00 EST 1975

OSTI ID:7354053

Bazua, C D; Wilke, C R

Alcoholic fermentation by Saccharomyces cerevisiae ATCC 4126 was studied. The aim of this work was to find the effect of the product concentration (ethanol) on the specific rates of cell growth and alcohol production. The experiments were conducted in a continuous culture chemostat where glucose was a limiting substrate, and the data were always obtained at steady state. Some preliminary batch experiments were also done. A Monod type kinetic model was applicable. A noncompetitive type of product inhibition was found. The data showed that at an ethanol concentration above 93 g/l the cells neither grow nor produce ethanol. Empirical equations are proposed to represent the inhibitory effect studied. A comparison with previous research work is also presented. It is shown that the differences found are not only due to the various microorganisms used but also to the conditions of the experiments and the manner of analyzing the data obtained. (auth)

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7354053
• Report Number(s): LBL-4423; CONF-751150-5
• Resource Relation: Conference: 1. chemical congress of North American Continent, Mexico City, Mexico, 30 Nov 1975
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
59 BASIC BIOLOGICAL SCIENCES
ETHANOL
BIOSYNTHESIS
SACCHAROMYCES CEREVISIAE
GROWTH
BIOCHEMICAL REACTION KINETICS
FERMENTATION
INHIBITION
ALCOHOLS
BIOCONVERSION
BIOMASS
ENERGY SOURCES
FUNGI
HYDROXY COMPOUNDS
KINETICS
MICROORGANISMS
ORGANIC COMPOUNDS
PLANTS
REACTION KINETICS
RENEWABLE ENERGY SOURCES
SACCHAROMYCES
SYNTHESIS
YEASTS
090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989)
550700 - Microbiology