This paper presents the kinetic analysis, using Generalized Power-Law equations to describe the results of an experimental investigation conducted on a batch submerged biofilm reactor for phosphorus removal under an anaerobic/aerobic cycle. The observed rates and amounts of phosphorus release and organic substrate uptake in the anaerobic phase leads to a kinetic model in which these two variables are dependent on each other with a non-linear behaviour and reach equilibrium values in both cases, at different times and are function of rate constants ratio.

The model has a good fit with experimental data except for C uptake at anaerobic contact times longer than four hours, where other kinetics are implied.

Kinetic parameters were obtained with different initial substrate concentrations, anaerobic contact cycles, and type of substrates.

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