Eighty-year-old aeration basins, 30-year-old equipment, no methane production from the digesters. The City of Two Rivers, Wis., had many reasons to upgrade its wastewater treatment plant.
Planning by Donohue & Associates Inc. started in 2006 to upgrade the aeration basins, install two new digesters, add a SCADA system, and use methane as fuel. It all turned into an award-winning design, receiving the State Finalist Engineering Excellence Award from the American Council of Engineering Companies of Wisconsin. The project’s general contractor was J.F. Ahern Company.
The upgraded plant, with 2.3 mgd average flow, is saving $20,000 a year in electricity and natural gas,
