Cellular-automata based modeling of heterogeneous biofilm growth for microbiological processes with various kinetic models

The study concerns modeling and simulation of the growth of biofilms with heterogeneous structureswith a discrete mathematical model based on theory of cellular automata. The article presents two-dimensional density distributions of biofilms for microbial processes: oxidation of ammonium byNitrosomonas europaeabacteria and glucose utilization byPseudomonas aeruginosabacteria. Theinfluence of limiting substrate concentration in the liquid phase on biofilm structure was determined.It has been shown that the value of death rate coefficient of microorganisms has the qualitative andquantitative influence on the density and porosity of the biofilm.