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Energy efficient ammonium feedback control
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
2012 (English)In: New Developments in IT & Water, 2012Conference paper, Oral presentation only (Refereed)
Abstract [en]

Ammonium feedback control is increasingly used to determine the dissolved oxygen set-point in aerated activated sludge processes. This study compare ammonium feedback control with different controller settings to constant dissolved oxygen control and a dissolved oxygen profile created by minimising the air flow rate. All simulated scenarios are set to reach the same treatment level of ammonium, based on a daily flow proportional average concentration. The influent included daily variations only, and comparisons are performed at different plant loads. The results suggest that ammonium feedback control can achieve close to optimal performance if a near proportional controller based on the in-situ ammonium concentration is used. Compared to constant oxygen concentration the best performing ammonium controller can achieve a 2.5 – 3.5 % savings in the air flow rate, while the optimal solution can achieve a 3 – 4 % saving.

Place, publisher, year, edition, pages
2012.
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:uu:diva-184798OAI: oai:DiVA.org:uu-184798DiVA: diva2:567898
Conference
New Developments in IT & Water, November 4-6, 2012, Amsterdam, The Netherlands
Available from: 2012-11-21 Created: 2012-11-14 Last updated: 2012-11-22Bibliographically approved

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Åmand, LindaCarlsson, Bengt

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