Gradient-Based Extremum Seeking Control Applied to a Dark Fermentation Process

https://doi.org/10.58571/CNCA.AMCA.2022.058

Resumen: In this paper we use an extremum seeking control strategy to maximize the produced ethanol in a dark fermenter. Such a strategy avails of a continuous estimation of the reactor’s input-output gradient to compute the dilution rate applied to the reactor. This dilution rate, however, is updated at discrete moments. We consider a scenario in which tequila vinasse is the raw material for this fermentation process; thereby reducing the concentrations of sugars in the vinasse and at the same time obtaining ethanol. Via numerical simulations we show the applicability of the strategy when the optimal concentration of ethanol varies in time as step functions.

¿Cómo citar?

López-Caamal, F., Hernández-Escoto, H., Cea-Barcia, G. & Torres, I. Gradient-Based Extremum Seeking Control Applied to a Dark Fermentation Process. Memorias del Congreso Nacional de Control Automático, pp. 318-323, 2022. https://doi.org/10.58571/CNCA.AMCA.2022.058

Palabras clave

Procesos Biológicos; Control Discontinuo (modos deslizantes); Control de Sistemas No Lineales

• Andrews, J.F. (1968). A mathematical model for the continuous culture of microorganisms utilizing inhibitory substrates. Biotechnology and Bioengineering, 10(6), 707–723.
• Andrietta, S.R. (1994). Modelagem, simulacao e controle de fermentacao alcoólica contínua em escala industrial. Unicamp.
• López-Caamal, F. and Moreno, J.A. (2019). Generalised multivariable supertwisting algorithm. International Journal of Robust and Nonlinear Control, 29(3), 634–660.
• López -López, A., Dávila -Vázquez, G., León-Becerril, E., Villegas-García, E., and Gallardo-Valdez, J. (2010). Tequila vinasses: generation and full scale treatment processes. Reviews in Environmental Science and Bio/Technology, 9(2), 109–116.
• Müller, V. (2001). Bacterial fermentation. Encyclopedia of Life Sciences.
• Shtessel, Y., Edwards, C., Fridman, L., and Levant, A. (2014). Sliding mode control and observation. Springer.
• Torres- Zúñiga, I., Lopez-Caamal, F., Hernandez-Escoto, H., and Alcaraz-Gonzalez, V. (2021). Extremum seeking control and gradient estimation based on the supertwisting algorithm. Journal of Process Control, 105, 223–235.