A TWO EQUATION MODEL OF BIOLOGICALLY REACTIVE SOLUTE TRANSPORT IN POROUS MEDIA

Transport of biologically reactive dissolved solutes in a porous medium including a biofilm phase is a complex process involving a wide variety of scales (from the bacteria scale to the aquifer heterogeneity scale) and processes (hydrodynamic, physicochemical and biochemical). The objectives of this work are 1) to derive a two-equation macroscopic model for bio-reactive transport at the Darcy-scale from the pore-scale description using the volume averaging method and 2) to compare the results of this model with those of a recently developed one-equation model but limited to local mass equilibrium conditions.