Seminario: Modelling biodegradation and growth of biomass via particle tracking
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Lugar: DECA - D2-305 - Aula
GRUPO DE HIDROLOGÍA SUBTERRÁNEA
(Unidad asociada CSIC-UPC)
Día: Jueves 14 de julio a las 15:00h
Autor: Malik Dawi (PhD Student)
Título: Modelling biodegradation and growth of biomass via particle tracking.
In natural porous media, biologically mediated reactions play a major role in determining the fate of many emerging organic compounds. Usually, chemical reactions that are catalysed by the presence of biomass are found to be highly nonlinear with complex kinetics. The non-linearity in the degradation equation implies a strong difficulty in directly implementing a numerical solution within a Lagrangian framework. Thus, numerical solutions have traditionally been sought in an Eulerian framework.
In this talk, a fully Lagrangian solution to the problem is presented. First, the Monod empirical equation is derived from a two-step reaction while the approach is less general to other derivations existing in the literature, it allows two things: (1) providing some physical meaning to the actual parameters in Monod equation, and more interestingly (2) formulate a methodology for the solution of the degradation equation incorporating Monod kinetics by means of a particle tracking formulation. We show how the method is successfully applied to reproduce two studies of microbially induced degradation. First, the observed kinetics of Pseudomonas putida F1 in batch reactors while growing on benzene, toluene and phenol, and second, the column study of carbon tetrachloride biodegradation by the denitrifying bacterium Pseudomonas Stutzeri KC.