Little Patuxent Water Reclamation Plant Biosolids Processing Facility, Addition No. 8

The Clark team constructed a new Dewatering and Drying Building and renovate existing process structures while the plant remains fully functional.

To ensure operational continuity, the team developed a plan detailing required temporary treatment operations and project sequencing required to maintain wastewater flow throughout the plant during construction.

The Little Patuxent Water Reclamation Plant produces 35 tons of biosolids each day. The biosolids process utilizes lime stabilization of undigested primary sludge and waste activated sludge to create Class A solids. The Addition No. 8 upgrade eliminates the need for lime stabilization, and adds anaerobic digestion, direct heat drying, centrate treatment, enhanced odor control facilities, and other process and electrical upgrades. Once the upgrade is complete, biosolids leaving the Little Patuxent facility will be of high enough quality to be used on local farmland and by the community. 

The project utilizes the Envision Rating System — a sustainable rating system for heavy civil infrastructure projects — and is seeking Gold certification.