Facing a new effluent total nitrogen discharge limit, the Town of Stafford, Connecticut chose to upgrade their 1.4 MGD Water Pollution Control Facility using a fixed media Integrated Fixed-Film/Activated Sludge (IFAS) system. The IFAS media would allow a retrofit of the existing aeration basins for biological nutrient removal without having to add basin volume.
The raw influent wastewater was a mixture of municipal and industrial wastes that included a high concentration of fibrous suspended solids from a local textile manufacturer. Because of the unusual nature of the wastewater, a pilot study was commissioned to confirm the design basis for the IFAS system. Piloting of the BioWeb system achieved steady state effluent ammonia concentrations of 1.1 mg/l, well below the target effluent ammonia of 2 mg/l. Construction of the full scale system began in the fall of 2009.
20 Webitat modules with over 122,408 ft2 of BioWeb Media