Abstract
Microbial aggrigate model discribed by double monod type and in which diffusion layer was taken into account was numerically analyzed by orthogonal collocation method. The model discribed by A. O. Lou et al. without diffusion layer was compared with our model with diffusion layer, in order to investigate effect of diffusion layer on the competitive growth of filamentous and floc former bacteria. It was reported that diffusion layer influenced the competitive growth in activated sludge floc.
The collocation number used in this study was ten, because the calculation of substrate removal flux converged at the collocation number.
