EFFECT OF OXYGEN ON ETHANOL FERMENTATION IN PACKED-BED TAPERED-COLUMN REACTOR

Date

1988-07-01

Author

Hamamcı, Haluk

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In ethanol production with immobilized yeast a major problem is the provision of nutrients to these highly concentrated cells. O2 being one of the nutrients of utmost importance to yeast cells, was fed into a column packed with beads with a cell loading of more than 40 g/l. Since addition of large volume of air or O2 to a cylindrical column reactor would aggravate the problems of pressure build up and channelling caused by the evolving CO2 gas, a tapered-column reactor and pulsed flow of oxygen gas was used. The supplement of O2 gas to the tapered column increased the productivity from 21.1 g ethanol x (l gel x h)-1 to 26.7 g x (l gel x h)-1, when the ethanol concentration at the outlet was about 80 g/l. The yield coefficient of ethanol was also increased from 0.41 g ethanol/g glucose to 0.43 after O2 supplement was started. The effects of frequency and duration of O2 supplement were also determined.

Subject Keywords

Biotechnology, Applied microbiology

URI

https://hdl.handle.net/11511/31905

Journal

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY

DOI

https://doi.org/10.1007/bf00250404

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

H. Hamamcı, “EFFECT OF OXYGEN ON ETHANOL FERMENTATION IN PACKED-BED TAPERED-COLUMN REACTOR,” APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, pp. 515–519, 1988, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31905.