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Energy Savings at Phoenix 23rd Avenue Wastewater Treatment Plant Using Feed-Forward Process Control

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Monitoring of influent loading and plant operating conditions, together with a real-time feedforward control model, allows dissolved oxygen (DO) set-points to be matched in real time to the influent loading. Adjusting DO set-points based on load results in a significant reduction in aeration energy. This paper discusses the monitoring technology, and optimization and control techniques used in an energy savings project at the 23rd Avenue Wastewater Treatment Plant (23rd Avenue WWTP) in Phoenix, Arizona. The plant treats an average of 48 MGD using an MLE process, with a goal of complete nitrification. The results of the project showed that over 15% of aeration energy can be saved through dynamic DO control, for a total annual energy savings of 2000 MWh.

Keywords: DO control; Energy conservation; Phoenix; aeration; feed forward control; nutrient analyzer; nutrient removal; process control; real time control

Document Type: Research Article


Publication date: January 1, 2009

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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