A simple change in equipment produced big savings on electricity for the Waterbury (Vermont) Wastewater Treatment Plant.
The plant was using surface aerators to provide mixing and aeration for its three lagoons, which hold 12 million gallons. The addition of a Medora Corporation - SolarBee / GridBee low-power subsurface mixer in the largest lagoon enabled the plant team to shut down some of the surface aerators and still get sufficient mixing and aeration.
The plant’s eggbeater-style and fountain-style surface devices provide good aeration but are not efficient at mixing the large lagoon, and their 10 hp motors use substantial power. On the
