Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (10): 2472-2480.doi: 10.1016/j.cjche.2019.04.014

• Catalysis, kinetics and reaction engineering • Previous Articles     Next Articles

Kinetic analysis via mathematical modeling for ferrous iron oxidation in a class of SBR-type system

Edgar N. Tec-Caamal1, Refugio Rodríguez-Vázquez1, Luis G. Torres-Bustillos2, Ricardo Aguilar-López1   

  1. 1 Center for Research and Advanced Studies of the National Polytechnic Institute, Av. Instituto Politécnico Nacional No. 2508, Colonia San Pedro Zacatenco, C. P. 07360 Ciudad de México D. F., Mexico;
    2 Interdisciplinary Professional Unit of Biotechnology-National Polytechnic Institute(UPIBI-IPN), Acueducto s/n, La Laguna Ticomán, Gustavo A. Madero, 07340, Ciudad de México, Mexico
  • Received:2018-11-23 Revised:2019-04-24 Online:2019-10-28 Published:2020-01-17
  • Contact: Ricardo Aguilar-López

Abstract: This paper analyses the oxidation of ferrous iron via chemical and biological means in a class of Sequential Batch Reactors (SBR-type). For this, a kinetic model for the study of iron oxidation system is proposed, followed by a parametric sensitivity analysis and a bifurcation analysis, which allow selecting the most influential kinetic parameters in order to ensure a suitable prediction capacity of the mathematical structure. The system consists of two SBR bioreactors, the first being used to produce hydrogen peroxide (H2O2) that is fed to a second reactor where the iron oxidation is carried out by chemical-biological processes. Model predictions were compared with experimental data for the production of H2O2 and for ferrous iron oxidation, finding suitable correlation coefficients (r2> 0.98) for each state variable. The bifurcation analysis showed the trajectories of the main variables, such as, biomass, H2O2 and ferrous iron, under the change of the most influential kinetic parameters. This analysis demonstrates the usefulness of the constructed model to predict the kinetic behaviour of the SBR-type process.

Key words: Bifurcation analysis, Hydrogen peroxide, Iron oxidation, Modeling, Simulation