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New insights in dynamic modeling of a secondary settler. Dynamical analysis

Abstract : A dynamic model of the settling process in the secondary settler of a wastewater treatment plant is given by a nonlinear scalar conservation law for the sludge concentration under the form of a partial differential equation (PDE). A numerical algorithm is given, which also includes a mathematical model of the aeration tank. Theoretical and numerical simulations are then compared with real data. The evolution of the shock corresponding to the rising of a sludge blanket is described by an ordinary differential equation (ODE). Consequently, regulation strategies of the rising of a sludge blanket in case of important water admission to the plant are proposed. We end briefly with two possible extensions. A model with two classes of particles in interaction is introduced to take into account the particle size change, as well as a model giving the distribution of residence times to take into account its effect on the velocity.A dynamic model of the settling process in the secondary settler of a wastewater treatment plant is given by a nonlinear scalar conservation law for the sludge concentration under the form of a partial differential equation (PDE). A numerical algorithm is given, which also includes a mathematical model of the aeration tank. Theoretical and numerical simulations are then compared with real data. The evolution of the shock corresponding to the rising of a sludge blanket is described by an ordinary differential equation (ODE). Consequently, regulation strategies of the rising of a sludge blanket in case of important water admission to the plant are proposed. We end briefly with two possible extensions. A model with two classes of particles in interaction is introduced to take into account the particle size change, as well as a model giving the distribution of residence times to take into account its effect on the velocity.
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Soumis le : mardi 22 janvier 2013 - 13:15:15
Dernière modification le : mercredi 19 décembre 2018 - 15:02:05

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J.Ph. Chancelier, M.C. de Lara, C. Joannis, F. Pacard. New insights in dynamic modeling of a secondary settler. Dynamical analysis. Water Research, IWA Publishing, 1997, 31 (8), pp.1857. ⟨10.1016/S0043-1354(96)00287-4⟩. ⟨hal-00779535⟩

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