| Due to the complexity of the anaerobic digestion process, representing it with a mathematical model is more difficult than any other process. In these days, mathematical models for the kinetic behavior of the microorganisms for the Upflow Anaerobic Sludge Blanket which maintains high concentration of the microorganisms and settling efficiency by forming granular sludges through the self-immobilization of the microorganisms are being developed. In this research, using the experimental results, the simplified kinetic model of the UASB process is described. The UASB reactor can be divided in three compartments : the sludge bed and sludge blanket, both perfectly mixed with respect to the liquid phase, and a plug flow settling region. The mass balance for the concentration of influent and effluent, biomass concentration and gas production rate in two sludge bed and blanket is established. By this simplified model, simulation and verification is studied using the experimental analysis and data from lab scale and pilot plant. It is investigated that the calculated value is almost fitted to the experimental data and coefficient of temperature effect, the ratio of biomass in the sludge bed and blanket and biological kinetic parameters are appropriated. |
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