Prediction of Some Biological Film Charteristics.

Abstract:
A multi components biofilm model has been developed and discussed which
accounts for all well established biological processes with biofilm(s):
• Substrate utilization [ aerobically, anoxically and anaerobically].
• Denitrification process.
• Nitrification process.
• The effect of diffusion and mass transfer limitations.
The model has predicted some important characteristics of biofilms such as:-
• Space distribution of substrate(s) within biofilms.
• Weight or thickness of biofilm layer (aerobic layer, anoxic layer and anaerobic
layer).
The results indicates that the relative thickness of biofilm layers (aerobically,
anoxically and anaerobic) is highly affected by the availability of the main electron
acceptor (O2 and NO3 and the organic load).