Clostridium ljungdahlii explained

Clostridium ljungdahlii is an anaerobic, rod-shaped, motile, endospore-forming, gram-positive bacterium.[1] It is named after the biochemist Lars G. Ljungdahl.[2] When originally harvested from the waste matter of animals, it tended to produce acetate with respect to ethanol, but a major undertaking to increase the ethanol-to-acetate ratio was initiated. A 1993 publication by researchers from the University of Arkansas, in cooperation with Oak Ridge National Laboratories, showed results from a series of continuous reactor studies caused a major change in the bacterium's preference for ethanol production, which increased from <0.1 g/L to 1.8 g/L in a continuous stirred tank reactor.[3]

This species can ferment certain components of syngas into ethanol.[4] It also possesses properties of electrosynthesis, producing acetate on cathodes.

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Notes and References

  1. Tanner, R.S., L.M. Miller, and D. Yang (1993) Clostridium ljungdahlii sp. nov., an acetogenic species in clostridial rRNA homology group I. Int. J. Syst. Bacteriol. 43:232-6.
  2. https://lpsn.dsmz.de/genus/clostridium lpsn.dsmz.de, list of prokaryotic names with standing nomenclature
  3. Phillips . J. R. . Klasson . K. T. . Clausen . E. C. . Gaddy . J. L. . 1993-09-01 . Biological production of ethanol from coal synthesis gas . Applied Biochemistry and Biotechnology . en . 39 . 1 . 559–571 . 10.1007/BF02919018 . 1559-0291.
  4. Younesi, H., G. Najafpour, and A.R. Mohamed (2005) Ethanol and acetate production from synthesis gas via fermentation processes using anaerobic bacterium, Clostridium ljungdahlii. Biochem. Eng. J. 27:110-119