Biotechnology Letters

, Volume 5, Issue 1, pp 1–5 | Cite as

Development of a simple defined medium for continuous ethanol production by Zymomonas mobilis

  • Jared E. Fein
  • Robert C. Charley
  • Kim A. Hopkins
  • Barbara Lavers
  • Hugh G. Lawford


A simple defined medium for the production of ethanol by Zymononas mobilis in continuous culture is presented. Under comparable cultural conditions very similar fermentation kinetics were obtained using simple, complex and semi-synthetic rich media.



Biomass concentration (g/l)


Dilution rate (h−1)


Highest dilution rate at which effluent glucose ⩽ 4g/l


Critical dilution rate (h−1)


maximum specific growth rate (h−1)


elle yield coefficient (g cells/g glucose consumed)


product yield coeffient (g ethanol/g glucose consumed)


specific rate of product formation (g ethanol/g cells/h)


volumetric productivity (g ethanol/l/h)


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Copyright information

© Chapman & Hall 1983

Authors and Affiliations

  • Jared E. Fein
    • 1
  • Robert C. Charley
    • 1
  • Kim A. Hopkins
    • 1
  • Barbara Lavers
    • 1
  • Hugh G. Lawford
    • 2
  1. 1.Weston Research CentreTorontoCanada
  2. 2.Department of BiochemistryUniversity of TorontoTorontoCanada

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