Effects of propionate and acetate additions on solvent production in batch cultures of clostridium acetobutylicum

Journal Article · Tue May 01 00:00:00 EDT 1990 · Applied and Environmental Microbiology; (USA)

OSTI ID:6631661

Huesemann, M H.W. ^[1]; Papoutsakis, E T ^[2]

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1. Rice Univ., Houston, TX (USA)
2. Northwestern Univ., Evanston, IL (USA)

Addition of acetate or propionate to uncontrolled-pH batch cultures does not affect the initiation of solventogenesis but does enhance final solvent concentrations compared with those of unchallenged cultures. This observation can be explained in terms of the increased buffering capacity of the medium brought about by the added acids, resulting in protection against premature growth inhibition due to low culture pH values at the end of the fermentation. The uptake of propionic acid from the medium does not proceed solely via the coenzyme A-transferase pathway, since less acetone than propanol is formed. Therefore, at least 50% of the propionic acid is taken up through the reversed kinase-phosphotransbutyrylase reaction pathway.

• OSTI ID: 6631661
• Journal Information: Applied and Environmental Microbiology; (USA), Vol. 56:5; ISSN 0099-2240
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
ACETATES
BIOLOGICAL EFFECTS
BUTANOLS
BIOSYNTHESIS
PROPIONIC ACID
BATCH CULTURE
CLOSTRIDIUM ACETOBUTYLICUM
FERMENTATION
GROWTH
ALCOHOLS
BACTERIA
BIOCONVERSION
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CLOSTRIDIUM
HYDROXY COMPOUNDS
METHANOGENIC BACTERIA
MICROORGANISMS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
SYNTHESIS
090900* - Biomass Fuels- Processing- (1990-)