LPWRP - Enhanced Nutrient Removal


The Little Patuxent Water Reclamation Plant is undergoing a $92-million Enhanced Nutrient Removal Expansion and Improvements project ( Addition No. 7 ).

Completion of the ENR portion of the project is scheduled to be placed in service in spring of 2012. This will increase the plant's ability to treat wastewater before its release into the Little Patuxent River and eventually, the Chesapeake Bay.

Excess nutrients, like nitrogen and phosphorus, lead to degraded water quality, which negatively impacts plant and animal life in the Chesapeake Bay and its tributaries. These excess nutrients can flow into the Bay from wastewater treatment plant discharges, stormwater runoff and from rainfall.

Howard County is excited to be moving forward with this advanced treatment technique to facilitate the cleanup efforts.

Denitrification Building

Construction of the Denitrification building. March 2011.

Enhanced Nutrient Removal is the use of technologies that will allow wastewater treatment plants to provide an advanced level of treatment. The goal of ENR is to achieve effluent nutrient concentrations of a maximum of 3.0 milligrams per liter (mg/l) total nitrogen and 0.3 mg/l total phosphorus.

The technology being used at the Little Patuxent Water Reclamation Plant is the installation of denitrification filters. These filters will convert nitrate-nitrogen into nitrogen gas thus reducing the amount of nutrients entering the Bay watershed.

Please use the links below to find out how Howard County is using this process to protect one of our most valuable natural resources.

Enhanced Nutrient Removal links :

ENR | History | Funding | Works | Pictures | Challenges | Links