Effect of oleic acid on the production of ethanol and fructose from glucose/fructose mixtures in an immobilized cell reactor

✍ Scribed by M. E. Guénette; Z. Duvnjak

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 364 KB
• Volume: 15
• Category: Article
• ISSN: 0138-4988
• DOI: 10.1002/abio.370150412

✦ Synopsis

Saccharornyces cerevisiae ATCC 39859 was immobilized onto small cubes of wood to produce ethanol and very enriched fructose syrup from glucoselfructose mixtures through the selective fermentation of glucose. A maximum ethanol productivity of 21.9 g 11. h was attained from a feed containing 9.7% (w/v) glucose and 9.9% (w/v) fructose. An ethanol concentration. glucose conversion and fructose yield of 29.6 g / 1, 62% and 99% were obtained, respectively. This resulted in a final fructose / glucose ratio of 2.7. At lower ethanol productivity levels the fructose / glucose ratio increases, as does the ethanol concentration in the effluent. The addition of 30 mg /1 oleic acid to the medium increased the ethanol productivity and its concentration by 13% at a dilution rate of 0.74 h -l.