Biological production of ethanol from coal. [Quarterly technical report], September 22, 1991--December 21, 1991

Technical Report · Tue Dec 31 00:00:00 EST 1991

DOI:https://doi.org/10.2172/10158584· OSTI ID:10158584

Research is continuing in attempting to increase both the ethanol concentration and product ratio from the C. ljungdahlii fermentation. Both batch and continuous reactors are being used for this purpose. The purpose of this report is four-fold. First, the data presented in PETC Report No. 2-4-91 (June--September 1991) are analyzed and interpreted using normalized specific growth and production rates. This technique eliminates experimental variation due to the differences in inoculum history. Secondly, the effects of the sulfur gases H{sub 2}S and COS on the performance of C. ljungdahlii are presented and discussed. Although these are preliminary results, they illustrate the tolerance of the bacterium to low levels of sulfur gases. Thirdly, the results of continuous stirred tank reactor studies are presented, where cell and product concentrations are shown as a function of agitation rate and gas flow rate. Finally, additional data are presented showing the performance of C. ljungdahlii in a CSTR with cell recycle.

• Research Organization: Arkansas Univ., Fayetteville, AR (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-89PC89876
• OSTI ID: 10158584
• Report Number(s): DOE/PC/89876-T14; PETC-2-5-91; ON: DE92016116
• Resource Relation: Other Information: PBD: [1991]
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
10 SYNTHETIC FUELS
59 BASIC BIOLOGICAL SCIENCES
COAL
BIOCONVERSION
SYNTHESIS GAS
ETHANOL
SYNTHESIS
QUANTITY RATIO
YIELDS
ACETATES
FERMENTATION
CARBON OXYSULFIDE
HYDROGEN SULFIDES
PROGRESS REPORT
CLOSTRIDIUM
CHEMICAL REACTION KINETICS
STIRRING
BIOREACTORS
CULTURE MEDIA
010408
100200
550700
C1 PROCESSES
PRODUCTION
MICROBIOLOGY