Dissolved Oxygen Control and Oxygen Utilization Rate Estimation: Extension of the Holmberg/Olsson Method
- 1 October 1989
- journal article
- Published by IWA Publishing in Water Science & Technology
- Vol. 21 (10-11) , 1197-1208
- https://doi.org/10.2166/wst.1989.0319
Abstract
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.Keywords
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