A biokinetic model is introduced which allows for the prediction of the development of flocforming, filamentous and ‘Nocardia' type microorganisms in aerobic activated sludge systems with a variety of different flowschemes and operating conditions. The model is based on the competition of the organisms for different organic substrates. For ‘Nocardia' a flotation process is introduced which allows for a longer residence time of these organisms as compared to the SRT. The model predicts activated sludge composition and behavior in accordance with a variety of experimental observations.
Research Article|March 01 1992
Modelling Population Dynamics in Activated Sludge Systems
Water Sci Technol (1992) 25 (6): 93-103.