Abstract
A numerical solution approach is presented for the mathematical model developed for the biological fluidized bed wastewater treatment process. The model includes equations describing the pollutant concentration change within the reactor and biofilm: a dispersed piston flow reactor model equation with a removal rate term and a nonlinear biofilm model equation. The spatial solution of the dispersed piston reactor model was achieved by using a finite element technique, Galerkin's method of weighed residuals, and its solution through time was performed by using an explicitbackward finite difference technique. Solution of the model equations gave results comparable to some experimental data obtained from the literature.
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