Direct fermentation of starch to lactic acid byLactobacillus amylovorus |
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Authors: | D X Zhang M Cheryan |
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Institution: | (1) Department of Food Science, University of Illinois at Urbana-Champaign Agricultural Bioprocess Laboratory, 1302 W. Pennsylvania Avenue, 61801 Urbana, Illinois, USA |
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Abstract: | Summary Fermentation production of lactic acid directly from starch was studied in a batch fermentor usingLactobacillus amylovorus. At an initial concentration of 120 g/L starch, 96.2 g/L of lactic acid was produced from liquefied starch in 20 hours while 92.5 g/L of lactate was produced from the raw starch in 39 hours. High initial glucose levels (100 g/L) in the medium inhibited the organism, unless it had been adapted by growing it in a low-glucose medium. The direct production of lactic acid from starch could reduce overall production costs significantly. |
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