A simultaneous sucrose bioconversion into ethanol and levan byZymomonas mobilis |
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Authors: | Beker M J Shvinka J E Pankova L M Laivenieks M G Mezhbarde I N |
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Institution: | 1.August Kirchenstein Institute of Microbiology, Latvian SSR Academy of Sciences, 1 August Kirchenstein St., 226067, Riga, Latvian SSR, USSR ; |
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Abstract: | Two biotechnological systems were developed for sucrose conversion into levan and ethanol withZymomonas mobilis, ensuring a 66.7% transfer of substrate carbon in a batch and 61% carbon transfer in a continuous culture. The effect of
glucose, ethanol, and medium pH on sucrose conversion byZ. mobilis was studied. The addition of ethanol to the fermentation medium, in the final conc. of 100 g/L, uncoupled levan synthesis
from ethanol fermentation. For a continuous culture, the most efficient conversion of substrate carbon into levan was reached
at pH 4.8, giving 64.2 g/L levan, with the levan yield of 0.22 g/g and the productivity of 3.2 g/L/h. |
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Keywords: | Index Entries" target="_blank">Index Entries Ethanol levan Zymomonas mobilis |
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