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Contributions of immobilized and free cells of salt-tolerantZygosaccharomyces rouxii andCandida versatilis to the production of ethanol and 4-ethylguaiacol

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Summary

The contribution of immobilized cells and free cells released from gel beads to ethanol production by the salt-tolerant yeastsZygosaccharomyces rouxii andCandida versatilis, and 4-ethylguaiacol (4-EG) production byC. versatilis were investigated using an airlift reactor. The amounts of ethanol produced by free cells were about 65% and about 90% of total ethanol in the reactor forZ. rouxii andC. versatilis, respectively. It was found that immobilized cells gave a much lower specific productivity of ethanol (ethanol production per hour per cell) than free cells of both yeasts, especially ofC. versatilis. 4-EG was produced mainly by immobilized cells ofC. versatilis; the amount of 4-EG produced by free cells was about 20% of the total 4-EG, in contrast to the results of ethanol production. However, the specific productivity of 4-EG (4-EG production per hour per cell) by immobilized and free cells was fairly similar.

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Correspondence to Takashi Hamada.

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Hamada, T., Sugishita, M. & Motai, H. Contributions of immobilized and free cells of salt-tolerantZygosaccharomyces rouxii andCandida versatilis to the production of ethanol and 4-ethylguaiacol. Appl Microbiol Biotechnol 33, 624–628 (1990). https://doi.org/10.1007/BF00604926

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Keywords

  • Ethanol Production
  • Specific Productivity
  • Immobilize Cell
  • Free Cell
  • Airlift Reactor