Modelagem, simulação, controle e otimização de processo de fermentação alcoólica da Saccharomyces cerevisiae

Abstract

The industrial alcoholic fermentation is carried out mainly with the yeast Saccharomyces cerevisiae due to its robustness. Thus, the use of computational models to optimize ethanol fermentation has been extensively studied using different types of controllers and kinetic equations, to increase the process yield. This work aims to determine the best arrangement in a control loop by testing different types of controllers and kinetic model of fermentation. Therefore, a robust model was built for the simulation of a control loop of a bioreactor for the automatic control of alcoholic fermentation using the Python language. The methodology used for the development and obtaining of the results will firstly follow the bibliographic review on the main kinetic models used for alcoholic fermentation by Saccharomyces cerevisiae, as well as the main types of controllers suitable for the process, study of the modeling of the control loop for the bioreactor, obtaining data and parameters necessary for the simulation of the models through the consulted literature, modeling of the control loops for the kinetic model used, study of the numerical methods used in Python environment in the resolution of the equations derived from the used models. Finally, produce graphs and evaluate the performance of the models. The system responded efficiently to the perturbations performed during the study, thus validating the developed model. In addition, the PID controller among the other types was identified as ideal for substrate feed control.