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Continuous ethanol production by immobilized yeast in a fluidized reactor

✍ Scribed by Gyu Heon Cho; Cha Yong Choi; Yang Do Choi; Moon H. Han

Publisher
Springer Netherlands
Year
1981
Tongue
English
Weight
218 KB
Volume
3
Category
Article
ISSN
0141-5492

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✦ Synopsis

In order to minimize the adverse effect of CO 2 gas in a packed bed immobilized yeast reactor, a fluidized bed reactor was used for the continuous production of ethanol from glucose.

Immobilized yeast was prepared by entrapping whole cells of Saccharomyces cerevisiae within a Caalginate matrix.

It was found that the efficiency of the ethanol production in a fluidized bed reactor was 100% better than that for a packed bed reactor system.

The alcohol productivity obtained was 21 g/I/hr in a fluidized bed reactor at 94% of conversion level.

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Yeast cells (Saccharomyces cerevX~iae) were immobilized in pectin gel, incubated 12 h at 30Β°C and then used for the continuous production of ethanol employing a wedge-shaped horizontal reactor and sugar cane molasses as the carbon source. Under steady state conditions the mean residence time was 1.6

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were immobilized by occlusion in pectin gel, no significant changes in their biological activity being observed. The ethanol production rate was found to be negatively affected by the diameter of the beads when the cell concentration in them was high. The fermentative activity was only slightly modi