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KMID : 0545119970070060438
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Journal of Microbiology and Biotechnology
1997 Volume.7 No. 6 p.438 ~ p.440
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Comparison of Immobilization Matrix for Ethanol Fermentation by Zymomonas mobilis and Saccharomyces cerevisiae
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Ryu Sang-Ryeol
Lee Ke-Ho
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Abstract
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A continuous fermentation system employing immobilized cells of Zymomonas mobilis and Saccharomyces cerevisiae was studied for the mass production of ethanol. Ethanol production by cells immobilized with Ca-alginate was better than those by cells immobilized with κ-carrageenan. Maximum ethanol production employing a continuous system by cells immobilized with Ca-alginate was 77.5 g·l^-1 h^-1 at a dilution rate of 1.85 h^-1 with 82% conversion rate for Z. mobilis while that was 40.2 g·l^1 h^1 at a dilution rate of 0.92 h^1 with 85% conversion rate for S. cerevisiae. These results suggest that Ca-alginate is a better cell immobilization matrix than κ-carrageenan and that immobilized cells of Z. mobilis are more efficient than S. cerevisiae for ethanol production.
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KEYWORD
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