A New Culture Method of Baker's Yeast to Remove Growth-inhibitory Substances : High COncentrated Cultivation of Baker's Yeast (I)

概要

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In order to increase the final cell concentration of baker's yeast by aerobic cultivation, a new culture method was developed which removed inhibitory substances. In this method, the culture broth wa taken out of the bioreactor and yeast cells were separated by a centrifugal cell separator, then only concentrated yeast cells were recycled to the bioreactor, while discarding the cell-free supernatant. The main carbon source (molasses) was fed in such a manner that the concentration of ethanol in the culture broth was maintained in the range of 200 to 1,000 ppm. The dissolved oxygen concentration in the culture broth was maintained in the range of 2 to 5 ppm. By this method, the cell concentration could be increased up to between 130g/l and 145g/l. The fermentation power of yeast cells thus obtained was better than that by the conventional method.
社団法人日本生物工学会の論文
1978-08-25