Champion a Better SCADA System
SWRCB Wastewater: 0.1 CEU
CWEA: 1 Contact Hour
Practice Area: Engineering & Research, Operations & Maintenance, Electrical & Instrumentation
Over the past few years, achieving energy neutrality has become an important goal for water resource recovery facilities. With aeration typically consuming around 50% of the WRRF total electrical power demand, optimizing aeration control is the most significant step a facility can take to minimize power demand. A recent development is ammonia-based aeration control where the airflow is minimized to the minimum required to support nitrification. Doing so reduces the dissolved oxygen (DO) concentration in the basin which has some benefits, such as the potential for simultaneous nitrification-denitrification, and some risks, such as compromising sludge settleability. The acceptable range of DO concentrations will also depend on the operating solids retention time (SRT), and the ability to control the operating SRT in a narrow range. This session will describe the efforts to minimize aeration power demand at Coachella Valley Water District’s Water Reclamation Plant 10 as well as improving SRT control. The impact of the ongoing optimization efforts on effluent quality, sludge settleability and sludge production as well as plant operations will be explored during this presentation.
Coenraad Pretorius
Senior Environmental Engineer
GHD
Irvine, CA
Dean Standing Warrior
Operations Manager-Electrical Services
Western Municipal Water District, CA