Mathematical process modeling and biokinetics of activated sludge process were reviewed considering different types of models. It has been evaluated the task group models of ASMI. and 2, and 3 versioned by Henze et al considering the conditions of each model and the different processes of which every model consists. It is revealed that ASMI contains some defects avoided in ASM3. Relied on homogeneity, Models can be classified into homogenous models characterized by taking the activated sludge process as one phase. In this type of models, the internal mass transfer inside the floes was neglected.. Hence, the kinetic parameter produces can be considered inaccurate. The other type of models is the heterogeneous model This type considers the mass transfer operations in addition to the biochemical reaction processes; hence, the resulted kinetic parameters can be considered more accurate than that of homogenous type.
AbdElHaleem, H S;  EI-Ahwany, A H;  Ibrahim, H I;  Ibrahim, G 
- Cairo Univ.-CivlI Eng. Dept., Giza (Egypt)
- CairoUlmrsity- Faculty ofEngincering - Chemical Engineering Department, Giza (Egypt)
- Helwan University- Faculty of Engineering - Biomedical Engineering Department, Helwan (Egypt)
- Menofia University- Faculty of Engineering Sbebin EI Kom- Basic Eng. Sc. Dept., Menofia (Egypt)