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Effect of slow feeding of xylose on ethanol yield byPachysolen tannophilus (1985)

Woods, Mark A. ; Millis, Nancy F.

Springer

Biotechnology letters 7 (1985), S. 679-682

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ISSN: 1573-6776

Source: Springer Online Journal Archives 1860-2000

Topics: Process Engineering, Biotechnology, Nutrition Technology

Notes: Summary With slow feeding of xylose to a batch fermentation byPachysolen tannophilus, the yield of ethanol from xylose was improved to 0.41 g/g (80% of theoretical) with a maximum ethanol concentration of 26.5 g/L at 120 h. This is a 41% improvement on the ethanol yield observed for batch fermentations without slow feeding. The optimum level of xylose in the medium was determined to be between 5 and 8g/L; xylose at greater than 10 g/L leads to xylitol accumulation, whereas xylose below 3 g/L permits ethanol to be oxidized to acetate. This latter effect is exacerbated by increased aeration.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01040209

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