A MATHEMATICAL MODEL OF THE OSCILLATIONS OF pH FOR THE ANODIC BIOFILM FORMATION IN A MICROBIAL FUEL CELL

  • I. Peraza-Baeza Institute at Arizona State University
  • A. Peréz-Hernández
  • L. Blanco-Cocom Mathematics Research Center (CIMAT),
  • J. Domínguez-Maldonado
  • L. Alzate-Gaviria
Keywords: microbial fuel cell, anodic biofilm, modeling, waste treatmen

Abstract

This paper presents a mathematical model developed in order to predict the anodic biofilm growth, considering the oscillatory behavior of the pH in the anodic chamber and the microbial kinetics. The kinetic parameters were estimated using a modified genetic algorithm. The results obtained by simulations provide a good fitting to the experimental data, indicating an optimum pH of 7.12 and qmax = 0.15 g Ac g X−1 day−1 . The anodic biofilm shows slow growth kinetics, meaning that the substrate concentration gradients were important up until the final stage of growth and showing prevalence of active biomass up to 22 micrometers away from the electrode. The increase of the current density obtained is associated with the increase of the biofilm thickness

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Published
2019-11-26
How to Cite
Peraza-Baeza, I., Peréz-Hernández, A., Blanco-Cocom, L., Domínguez-Maldonado, J., & Alzate-Gaviria, L. (2019). A MATHEMATICAL MODEL OF THE OSCILLATIONS OF pH FOR THE ANODIC BIOFILM FORMATION IN A MICROBIAL FUEL CELL. Revista Mexicana De Ingeniería Química, 15(3), 763-771. Retrieved from http://www.rmiq.org/ojs311/index.php/rmiq/article/view/1032

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