Energy efficient ammonium feedback control
2012 (English)In: New Developments in IT & Water, 2012Conference paper, Presentation (Refereed)
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
IdentifiersURN: urn:nbn:se:uu:diva-184798OAI: oai:DiVA.org:uu-184798DiVA: diva2:567898
New Developments in IT & Water, November 4-6, 2012, Amsterdam, The Netherlands