Session 4 Bioengineering Research

Applied Biochemistry and Biotechnology

, Volume 39, Issue 1, pp 559-571

Biological production of ethanol from coal synthesis gas

Medium development studies
  • J. R. PhillipsAffiliated withDepartment of Chemical Engineering, University of Arkansas
  • , K. T. KlassonAffiliated withOak Ridge National Laboratory
  • , E. C. ClausenAffiliated withDepartment of Chemical Engineering, University of Arkansas
  • , J. L. GaddyAffiliated withDepartment of Chemical Engineering, University of Arkansas

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Abstract

The anaerobic bacteriaClostridium ljungdahlii produces ethanol and acetate from CO, CO2, and H2 in synthesis gas. Early studies with the bacterium showed that relatively high concentrations of ethanol could be produced by lowering the fermentation pH and eliminating yeast extract from the medium in favor of a defined medium. This article presents the results from a medium development study based on the aerobic bacteriumEscherichia coli. The results of continuous-reactor studies in a continuously stirred tank reactor (CSTR) with and without cell recycle are shown to demonstrate the utility of this improved medium.

Index Entries

C. ljungdahlii ethanol acetate synthesis gas carbon monoxide hydrogen