In completing a $2 million upgrade to the Wausau Wastewater Treatment Plant, the staff did everything possible to improve energy efficiency with the new equipment.
Planning began three years ago and the project went online in fall 2011. "The existing blower equipment was dated, inefficient and breaking down," says Ken Ligman, project manager from the Becher-Hoppe Associates engineering firm in Wausau. The 8.2 mgd (design) advanced activated sludge plant serves Wausau, the City of Schofield, and part of a neighboring township. Its average flow is 4 mgd.
The old plant had three positive displacement blowers
