Biological production of ethanol from coal. [Quarterly report], September 22, 1991--December 21, 1991
Research is continuing in attempting to increase both the ethanol concentration and product ratio (acetate to ethanol) 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 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:
- 10155722
- Report Number(s):
- DOE/PC/89876-T5; PETC-2-5-91; ON: DE92015664
- Resource Relation:
- Other Information: PBD: 1 May 1992
- Country of Publication:
- United States
- Language:
- English
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Biological production of ethanol from coal
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