| Affiliation: | (1) Chemical Engineering Department, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil;(2) Chemical Engineering Department, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 288/24, ZC 90050-170 Porto Alegre, RS, Brazil;(3) Food Science and Technology Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil |
| Abstract: | This work presents a multi-route, non-structured kinetic model for determination of microbial growth and substrate consumption in an experimental batch bioreactor in which  -galactosidase is produced by Kluyveromyces marxianus growing on cheese whey. The main metabolic routes for lactose, and oxygen consumption, cell growth, and ethanol production are derived based on experimental data. When these individual rates are combined into a single growth rate, by rewriting the model equations, the model re-interpretation has a complexity similar to that of the usual variations of the Monod kinetic model, available in the literature. Furthermore, the proposed model is in good agreement with the experimental data for different growth temperatures, being acceptable for dynamic simulations, processes optimization, and implementations of model-based control technologies. |
