Abstract

The aim of this study is to investigate production of Baker’s yeast using a theoretically programmed fed-batch fermentor to produce as much as possible Baker’s yeast biomass using a minimal amount of substrate with low energy for stirring and aerating. Theoretical data obtained through material balance and kinetics equations were compared with experimental data and possible disagreements discussed with possible physical explanations. The result showed that the experimental biomass yield is greater than the theoretical one. An experimental yield of 92.2% was obtained for growing 191 mol of biomass with 207.8 mol of sugar with low oxygen uptake rate. Also, the obtained specific growth rate () of 0.39 h-1 exceeds by far the maximum specific growth rate of the yeast under aerobic condition as obtained theoretically.

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