Abstract
Fed-batch ethanol fermentation tests of sugar cane blackstrap molasses were carried out at 32° C and ph 4.5–5.0, using pressed yeast as inoculum, and with no air supply. Two values of the fermentor filling-up time were adopted: 5 h and 7 h. The feeding rates obeyed equation F=F0·−K·t, with K equal to 0.0, 0.2, 0.4, 0.6 and 0.8 h−1. The average yeast yields and the average yeast productivities increased up to 33% and 45%, respectively, while the ethanol yield (average=76%; standard deviation=4%) was practically unaffected when K increased from 0 to 0.8 h−1.
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Correspondence to: E. Aquarone
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de Carvalho, J.C.M., Aquarone, E., Sato, S. et al. Fed-batch alcoholic fermentation of sugar cane blackstrap molasses: influence of the feeding rate on yeast yield and productivity. Appl Microbiol Biotechnol 38, 596–598 (1993). https://doi.org/10.1007/BF00182795
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DOI: https://doi.org/10.1007/BF00182795