Whether it’s a combined heat and power system, fat, oil and grease (FOG) management, solar energy or even hydropower, the Gresham (Ore.) Wastewater Treatment Plant leaves no stone unturned in its quest for energy independence. The plant and its operating staff are well on the way toward that goal. This 20-mgd activated sludge facility has been operated since 2005 by Veolia Water North America. Sixteen Veolia employees work there. Alan Johnston, senior engineer with the City of Gresham Wastewater Services Division, oversees the contract with Veolia. Energy savings have always been a priority for the city. “The ultimate goal is
