Abstract
The operation of vertical packed bed fermentors for ethanol production in a three cycle EX-FERM technique is described. Two S. cerevisiae strains were used, and chipped, previously dried and stored sugarcane was the substrate. Ethanol yields were acceptable in the three cycles, although one strain showed a slight product inhibition tendency. Percent sugar consumption depended on the yeast strain, being rather good for strain 178. A rapid hydrolysis of sucrose into its components has been demonstrated during the EX-FERM sucrose extraction and fermentation. Most of the yeast ends trapped in the solid matrix at the end of each cycle. The results support the validity of the concept of packed bed fermentors operated in cycles for the EX-FERM technique.
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de Cabrera, S., de Arriola, M.C., Morales, E. et al. EX-FERM ethanol production in packed bed fermentors: A three cycle operation employing chipped sugarcane. Biotechnol Lett 3, 497–502 (1981). https://doi.org/10.1007/BF00147561
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DOI: https://doi.org/10.1007/BF00147561