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- W810038963 abstract "The present work, which was carried out in a full scale plant for industrial fermentation with bioreactors operated as fed-batch, had the objective to verify how the operational factors such as feeding time, temperature and yeast concentration may influence the sugar conversion velocity into ethanol. Also compared the yield and productivity of the essays, the interaction of between ethanol and glycerol in the fermentative kinetics and hoe these factors could be optimized in order to increase the ethanol production with low losses of carbon as by other products. Additionally, a kinetic model that best fitted in the obtained data was proposed. For the essays it was used an east already in used at the industrial process and its must, which came from an mixture of juice and residual molasse from sugar process phase. The experimental design followed and factorial planning 23 resulting in eight essays plus three repetition of the central point. The studied parameters were: substrate concentrations, ethanol, glycerol and cells. A non structured model was used for kinetic evaluation considering just one substrate source (ART) and another one considering two substrate sources (glucose and fructose). The results indicated that the glycerol production was linearly related to the ethanol production and these two routes are linked to the regeneration of NAD by yeast and this relation may be influenced by process conditions. The feeding time had significant effect and conversely proportional to the glycerol and ethanol production relation. The two kinetic models used were very flexible, adjusting well to the experimental points and the model for two substrates smallest deviations between the data and the curves adjustment, emphasizing the consumption differential between glucose and fructose." @default.
- W810038963 created "2016-06-24" @default.
- W810038963 creator A5005188535 @default.
- W810038963 date "2013-12-18" @default.
- W810038963 modified "2023-09-24" @default.
- W810038963 title "Fatores operacionais e cinética do processo fermentativo para otimização da produção de etanol em escala industrial" @default.
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