Sometimes a simple change can make a big impact. Such is the case for the drinking water treatment plant in St. Peters, Mo. By replacing old motors and installing variable-frequency drives (VFDs), the plant team reduced energy consumption by 12 percent, saving 253,500 kWh per year.
To supply water to 18,300 service connections, St. Peters draws water from the Missouri River and a groundwater wellfield. River water is treated at a plant in nearby St. Louis and sold back to St. Peters wholesale.
Water from eight wells is treated at the St. Peters plant, where it undergoes aeration, lime addition to settle
