A benchmark problem was defined to evaluate the performance of different mathematical biofilm models. The biofilm consisted of heterotrophic bacteria degrading organic substrate and oxygen. Mathematical models tested ranged from simple analytical to multidimensional numerical models. For simple and more or less flat biofilms it was shown that analytical biofilm models provide very similar results compared to more complex numerical solutions. When considering a heterogeneous biofilm morphology it was shown that the effect of an increased external mass transfer resistance was much more significant compared to the effect of an increased surface area inside the biofilm.
Comparing biofilm models for a single species biofilm system
E. Morgenroth, H.J. Eberl, M.C.M. van Loosdrecht, D.R. Noguera, G.E. Pizarro, C. Picioreanu, B.E. Rittmann, A.O. Schwarz, O. Wanner; Comparing biofilm models for a single species biofilm system. Water Sci Technol 1 June 2004; 49 (11-12): 145–154. doi: https://doi.org/10.2166/wst.2004.0826
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