Listening to operators discuss their experiences with nitrogen control at the 2012 WEFTEC Conference convinced manager Michael Lunn of the Grand Rapids (Mich.) Wastewater Treatment Plant that nitrification was coming. It also promised energy savings.Lunn and Laron Morgan, technical controls supervisor, researched ammonia analyzers for the South Plant treatment train. When the team contacted Hach, the window of opportunity flew open. “They had a real-time nitrogen controller in European facilities and were looking for a pilot plant in the U.S.,” says Lunn.The city agreed to the test and purchased two AMTAX sc ammonia analyzers, a SOLITAX sc suspended solids probe,
