Dynamic Modeling and Control Strategies for the Activated Sludge Process

Conventional activated sludge processes may be controlled by sludge recycle rate, waste sludge flow rate, and aeration rate. In a multistage reactor system such as the step-feed process, variations in wastewater feed patterns are another control technique. A wide-spectrum activated sludge process mo...

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Bibliographic Details
Published in:Journal - Water Pollution Control Federation 1975-01, Vol.47 (5), p.1055-1080
Main Authors: Busby, Joseph B., Andrews, John F.
Format: Article
Language:English
Subjects:
Activated sludge
Aeration
Chemical suspensions
Colloids
Flow velocity
Modeling
Polls
Separators
Sludge
Wastewater
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Summary:Conventional activated sludge processes may be controlled by sludge recycle rate, waste sludge flow rate, and aeration rate. In a multistage reactor system such as the step-feed process, variations in wastewater feed patterns are another control technique. A wide-spectrum activated sludge process model was developed that considers the storage capability of the sludge, incorporates the active and inert fractions of the mixed liquor volatile suspended solids in separate mass balances, and is coupled with a dynamic model of the final clarifier. Control strategies investigated include various sludge wasting and recycle control techniques and hydraulic methods. Computer simulation results indicate that the model satisfactorily describes the different process versions and that dynamic variations in wastewater feed pattern are valuable for control.
ISSN:0043-1303