Dissolved Oxygen Control and Oxygen Utilization Rate Estimation: Extension of the Holmberg/Olsson Method

Dissolved Oxygen Control and Oxygen Utilization Rate Estimation: Extension of the Holmberg/Olsson Method

The Holmberg/Olsson method for simultaneous adaptive dissolved oxygen control and oxygen utilisation rate estimation in the diffused air activated sludge process is evaluated (Holmberg and Olsson. 1985; Holmberg, 1986). Small offsets in the parameter estimates occur because the Q/V term is not inclu...

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Veröffentlicht in:Water science and technology 1989-01, Vol.21 (10-11), p.1197-1208
Hauptverfasser: Bocken, S M, Braae, M, Dold, P L
Format: Artikel
Sprache:eng
Schlagworte:
Activated sludge
Activated sludge process
Adaptive control
Air flow
Approximation
Closed loop systems
Diffusion rate
Dissolved oxygen
Estimates
Flow rates
Flow velocity
Methods
Offsets
Oxygen
Parameter estimation
Process controls
Sludge
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Beschreibung
Zusammenfassung:The Holmberg/Olsson method for simultaneous adaptive dissolved oxygen control and oxygen utilisation rate estimation in the diffused air activated sludge process is evaluated (Holmberg and Olsson. 1985; Holmberg, 1986). Small offsets in the parameter estimates occur because the Q/V term is not included in the estimator model. Significant offsets may occur as a result of assumptions regarding the KLa/air flow rate relationship. Extensions are proposed to overcome the offset problems.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1989.0319