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 (H

2

O

2

) 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 H

2

O

2

and for ferrous iron oxidation

finding suitable correlation coefficients (r

2

0.98) for each state variable. The bifurcation analysis showed the trajectories of the main variables

such as

biomass

H

2

O

2

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.