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.

You do not currently have access to this content.