Modeling of biofilm structure using cellular automaton

Cellular automaton model has been elaborated for simulation microbial process in a biofilm. It was shown that the proposed algorithm gives possibility to obtain various structures of microbial biofilms, depending on operating conditions

ADVANTAGES OF THE APPLICATION OF FLUIDIZED BED BIOREACTORS TO A MICROBIOLOGICAL NITRIFICATION PROCESS

The paper presents application possibilities of two and three-phase fluidized bed bioreactors for carrying out a microbiological nitrification process. The advantages and disadvantages of individual bioreactors are described. A quantitative analysis of the fundamental operating variables related to the balance of oxygen and the preservation of the fluidized bed was performed

Steady state characteristics of a three-phase fluidizedbed bioreactor with partial biomass recirculation

The paper presents modeling and simulation results of the operation of a three-phase fluidized bedbioreactorwith partial recirculation of biomass. The proposed quantitative description of the bioreactortakes into account biomass growth on inert carriers, microorganisms decay and interphase biomasstransfer. Stationary characteristicsof the bioreactorand local stability of steady-states were determined.The influence of microbiological growth kinetics on the multiplicity of steady-states was discussed.The relationship between biofilm growth and boundaries of fluidized bed existence was show

Phenomenological and numerical issues concerning dynamics of nonisobaric multicomponent diffusion of gases in macroporous media

The homogeneity of an immiscible liquid–liquid system was investigated in a baffled vessel agitated by a Rushton turbine. The dispersion homogeneity was analyzed by comparing Sauter mean diameters and drop size distribution (DSD) determined in different measured regions for various impeller speeds. The sizes of droplets were obtained by the in-situ measurement technique and by the Image Analysis (IA) method. Dispersion kinetics was successfully fitted with Hong and Lee (1983) model. The effect of intermittency turbulence on drop size reported by Bałdyga and Podgórska (1998) was analyzed and the multifractal exponent was evaluated