A reduced specific ethanol-forming performance of yeast at high biomass concentrations as a result of a changed ethanol-tolerance behaviour of the cells under condition of limitation. II. Proving the effect in high-flow rate fermentations with saccharomyces cerevisiae Sc 5

✍ Scribed by K. Richter; U. Becker; D. Meyer

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 387 KB
• Volume: 9
• Category: Article
• ISSN: 0138-4988
• DOI: 10.1002/abio.370090105

✦ Synopsis

In growth-factor limited fermentations carried out in continuous high-flow rate fermenters the relationship existing between the specific ethanol formation rate and the ethanol concentration was found to change its characteristics from a linear function into a nonlinear one a t high biomass concentrations. The deviation from the linear inhibitory behaviour of the cells was the greater the more the biomass concentration increased. A very good correspondence between the experimentally found productivities of ethanol formation and its adequate values obtained by calculation could be attained by using a n improved steady-state productivity model, in which the variability of the function v = f(P) had been considered.