10.4122/1.1000000254
Malta, Sandra
Sandra
Malta
smcm@uniriotec.br
Couto, Paula
Paula
Couto
prlima@lncc.br
Malta, Sandra
Sandra
Malta
smcm@uniriotec.br
Couto, Paula
Paula
Couto
prlima@lncc.br
Computational Modelling of the Contaminant Transport with Biodegradation Processes and Physical Sorption in a Saturated Porous Medium
XVI International Conference on Computational Methods in Water Resources
2006
2006
The aim of this work is to show a computational modelling of the contaminant
transport with biodegradation processes and physical sorption in a saturated porous
medium, which characterizes a stage of subsurface contamination by organic
contaminants. Sorptions in equilibrium and non-equilibrium mode are incorporated
upon the model and the sorption isotherms are set as Freundlich kind. Moreover,
aerobic biodegradation is modeled through the double and simple minimum-rate Monod
kinetics. Mathematically, the problem is given by a non-linear advection-diffusion-
reaction partial differential system coupled by the reaction terms, which are
associated to the kinetics that governs the biodegradation processes. Solving these
nonlinear equations simultaneously may be very costly in computation time. Thus, an
operator-splitting operator scheme is employed for treating in a sequential fashion
the convection-diffusion and reaction terms. The finite difference and stabilized
finite element (SUPG) methods are used in the time and spatial discretizations,
respectively, combined with a linearization algorithm, to solve the convection-
diffusion transport system, and then reaction is approximated by Newton-Raphson type
methods