Abstract
Efficient separation of solids and supernatant is crucial in an activated sludge system since performance of the system depends on the return of active biological solids. A simple discrete linear dynamic model is applied to secondary clarifier performance. Dynamic modelling could accurately predict movement of the sludge blanket height in secondary clarifiers and also indicate the level of the current limiting solids flux. Change in model parameters may indicate either altered sludge composition and settling characteristics, or disturbances in the sedimentation process.
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