%0 Journal Article
%T New insights in dynamic modeling of a secondary settler. Dynamical analysis
%+ CERGRENE (CERGRENE)
%+ Division Eau et Environnement (LCPC/EAU)
%A Chancelier, J.Ph.
%A de Lara, Michel
%A Joannis, C.
%A Pacard, F.
%< avec comitÃ© de lecture
%@ 0043-1354
%J Water Research
%I IWA Publishing/Elsevier
%V 31
%N 8
%P 1857
%8 1997
%D 1997
%R 10.1016/S0043-1354(96)00287-4
%Z Environmental SciencesJournal articles
%X 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.
%G English
%L hal-00779535
%U https://enpc.hal.science/hal-00779535
%~ SDE
%~ AGROPARISTECH
%~ ENPC
%~ ENGREF
%~ PARISTECH
%~ GIP-BE
%~ UNAM
%~ IFSTTAR
%~ UNIV-EIFFEL
%~ IFSTTAR-UNIVEIFFEL