Patapsco Wastewater Treatment Plant, City of Baltimore DPW

$245M final design of the ENR upgrade of an 81-MGD facility using attached growth biological aerated filters (BAF) for nitrification and denitrification. The ENR facility removes nitrogen and phosphorus to the Limit of Technology (LOT) in accordance with the Maryland Department of the Environment's ENR Strategy; the ENR standards are to reduce the effluent total nitrogen concentration to less than 3.0 mg/L and total phosphorus to less than 0.3 mg/L at all times.