hal-00779535
https://enpc.hal.science/hal-00779535
doi:10.1016/S0043-1354(96)00287-4
[SDE] Sciences De l'Environnement
[AGROPARISTECH] AgroParisTech
[ENPC] Ecole des Ponts ParisTech
[ENGREF] Ecole Nationale du Génie Rural des Eaux et des Forêts
[PARISTECH] ParisTech
[GIP-BE] GIP Bretagne Environnement
[UNAM] l'unam - université nantes angers le mans
[IFSTTAR] Ifsttar
[UNIV-EIFFEL] Université Gustave Eiffel
[IFSTTAR-UNIVEIFFEL] Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux
New insights in dynamic modeling of a secondary settler. Dynamical analysis
Chancelier, J.Ph.
de Lara, Michel
Joannis, C.
Pacard, F.
[SDE] Environmental Sciences
ART
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.
1997
en
Water Research
IWA Publishing/Elsevier