Biological production of ethanol from coal. [Quarterly report], September 22, 1990--December 21, 1990

Technical Report · Mon Dec 31 00:00:00 EST 1990

DOI:https://doi.org/10.2172/10158574· OSTI ID:10158574

Previous results have shown that the medium pH, the composition of the medium and concentration of medium constituents significantly affect the ratio of ethanol to acetate in the product stream when fermenting CO, CO{sub 2} and H{sub 2} in synthesis gas to products by Clostridium ljungdahlii. An additional batch study was carried out varying the agitation rate at pH 4, 4.5 and 5.0. It was speculated that increased agitation rates in combination with low pH might result in increased ethanol production while, at the same time, yielding higher cell concentrations which could eventually result in higher ethanol concentrations.

• Research Organization: Arkansas Univ., Fayetteville, AR (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-89PC89876
• OSTI ID: 10158574
• Report Number(s): DOE/PC/89876-T11; PETC-2-1-91; ON: DE92016113
• Resource Relation: Other Information: PBD: [1990]
• Country of Publication: United States
• Language: English

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01 COAL, LIGNITE, AND PEAT
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BIOCONVERSION
SYNTHESIS GAS
ETHANOL
SYNTHESIS
QUANTITY RATIO
YIELDS
ACETATES
PH VALUE
FERMENTATION
PROGRESS REPORT
CLOSTRIDIUM
CHEMICAL REACTION KINETICS
STIRRING
BIOREACTORS
CULTURE MEDIA
010408
100200
550700
C1 PROCESSES
PRODUCTION
MICROBIOLOGY