Prediction of substrate consumption rate, average biofilm density and active thickness for a thin spherical biofilm at pseudo-steady state |
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Authors: | Abdurrahman Tanyolaç Haluk Beyenal |
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Institution: | aDepartment of Chemical Engineering, Hacettepe University, Beytepe06532 AnkaraTurkey;bDepartment of Chemical Engineering, Hacettepe University, Beytepe06532 AnkaraTurkey |
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Abstract: | In this work, a new approach is proposed to evaluate substrate consumption rate, average biofilm density and active thickness of a spherical bioparticle in a completely mixed fluidized bed system. The substrate consumption rate and average biofilm density are predicted for a given biofilm surface substrate concentration and operational biofilm thickness. A diffusion and reaction model is developed with an effective diffusion coefficient that depends on the average biofilm density. This approach, a first in the literature, predicts the optimum average density of a biofilm to yield the maximum substrate consumption rate within the biofilm. A reasonable correlation was observed between the model prediction and experimental results for substrate consumption rate and average biofilm density for thin and fully active biofilms. |
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Keywords: | Biofilm Density Thickness Fluidized bed Substrate consumption |
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