Biosolids are what’s left over after wastewater is treated. It has usually been considered solely as a waste product. With proper processing, however, it can be beneficial and marketable as a fertilizer. BWSC is a key part of the design-build team for a new biosolids processing facility to replace Nashville’s Central Plant’s dewatering equipment and outdated residuals management system.

The new facility will provide thickening, stabilization, and anaerobic sludge digestion, as well as recapturing methane gas to use as fuel for heat drying. The heat drying is the last step in the creation of the Class A biosolid pellets which can be used and marketed as a fertilizer.

BWSC was responsible for permitting, architecture and landscape design, civil and demolition engineering.  BWSC streamlined the permitting process, saving time and money, and kept permitting off the critical path of the project, enabling the project to move forward quickly. The architecture and landscaping of this industrial-scale facility purposefully reflect the character of the neighborhood.

Key notes
$120 million facility
Architecture, landscape architecture, civil and demolition engineering
Provided permitting with local and state entities
Managed EPA compliance
Coordinated with impacted industrial stakeholders (CSX Railroad, Colonial Gas)