Cfstr Model

The CFSTR model is derived based on the flow diagram shown in Figure 7.21.2. The model assumes that waste stabilization occurs only in the aeration basin, although the secondary clarifier is an integral part of the activated-sludge process. Furthermore, the amount of sludge in the secondary clarifier is assumed to be small compared to that in the aeration basin. A mass balance on the microorganisms in the system yields the following equation:

where: X

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