With the current national emphasis on restoring the water quality of America’s urban waterways, the City of Brockton (Massachusetts) Advanced Water Reclamation Facility wanted to stay ahead of the regulatory cycle — in particular, phosphorus discharge limits set forth by the National Pollution Discharge Elimination System program of the U.S. EPA. For this region of the country, the EPA has proposed total phosphorus discharge limits of 0.1 mg/L.

The Brockton plant’s existing treatment scheme included physical settling (primary treatment), activated sludge treatment (secondary treatment) and final filtration (tertiary treatment) using two AquaDiamond cloth media filters from Aqua-Aerobic Systems. Even though the filters performed to a level well below the current phosphorus discharge limit of 0.2 mg/L, plant superintendent Dave Norton began looking for ways to not only improve the plant’s removal efficiency to meet the anticipated 0.1 mg/L limit, but to achieve it with minimal equipment modification and without raising operating costs with chemical addition. 

Download the case study to read about the solution found with Aqua-Aerobic Systems AquaDiamond cloth media filters.