HAL CCSD
New insights in dynamic modeling of a secondary settler. Dynamical analysis
Chancelier, J.Ph.
de Lara, Michel
Joannis, C.
Pacard, F.
CERGRENE (CERGRENE) ; Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF)-École des Ponts ParisTech (ENPC)
Division Eau et Environnement (LCPC/EAU) ; Laboratoire Central des Ponts et Chaussées (LCPC)-PRES Université Nantes Angers Le Mans (UNAM)
International audience
ISSN: 0043-1354
Water Research
IWA Publishing/Elsevier
hal-00779535
https://enpc.hal.science/hal-00779535
https://enpc.hal.science/hal-00779535
Water Research, 1997, 31 (8), pp.1857. ⟨10.1016/S0043-1354(96)00287-4⟩
DOI: 10.1016/S0043-1354(96)00287-4
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0043-1354(96)00287-4
en
[SDE]Environmental Sciences
info:eu-repo/semantics/article
Journal articles
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