More Capacity, Same Footprint: Modifications to the Secondary Clarifiers at the Patapsco WWTP to meet ENR Program Goals

Patapsco Wastewater Treatment Plant
Baltimore, Maryland

The State of Maryland Enhanced Nutrient Removal (ENR) Program sets effluent goals of 3.0
mg/L total nitrogen (TN) and 0.3 mg/L total phosphorus (TP) for plants that discharge to the
Chesapeake Bay tributaries. To meet ENR Program goals, the City of Baltimore will construct
new ENR treatment facilities downstream of the existing secondary clarifiers at the 81 MGD
Patapsco WWTP. The new ENR facilities include biological aerated flooded filters (BAFF) and
denitrification filters. The performance of the ENR processes and the ability of the plant to meet
ENR effluent goals will depend directly on the performance of the secondary clarifiers. This
paper will discuss the design efforts for modifications to the secondary clarifiers to incorporate
energy dissipating inlet (EDI) and will provide step-by-step approach in the evaluation and
selection of the design. Construction of this project will begin in 2011.

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Posted: May 20th, 2011 | Filed under: 100K-500K, Waste Water Treatment | Tags: Environmental Impact, Improved Clarifier Performance, Improved Process Performance, Increased Plant Capacity, Reduced Nutrient Load | No Comments »

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