Dynamics and Simulation of a Biological Fluidized Bed Reactor,
WISCONSIN UNIV-MADISON DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
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Getting consistently high efficiency for biological nitrification during cold weather is an important problem that was stuided by operating and modeling a fluidized bed pilot plant. The pilot plant experiments, including some step change and impulse dynamic tests were encouraging, and a model has been used successfully to fit both steady-state and dynamic performance data. The calibration runs indicated that the kinetic model, which includes rate limitations from several substrates and intraparticle diffusion, adequately describes the rate of substrate flux into the bioparticles. Alkalinity, pH, and nitrate data give good verification of the steady state prediction. The values of parameters used to fit the experimental data seem typical and their trends with time can be qualitatively explained. The parameters obtained in the steady state runs were used to successfully simulate the dynamic experiments. The results of these dynamic experiments lend general validity to the theoretical approach and provide a basis for further work to eliminate the uncertainty incorporated in the fitting parameters.