Site work and renovation of a water / sewer project in Bel Air, Maryland. Completed plans call for the renovation of a water / sewer project.

The Sod Run WWTP is a 20 MGD ENR facility with a modified 5 stage Bardenpho activated sludge process followed by denitrification filters. The plant utilizes primary solids fermenters to create a carbonaceous BOD feed into activated sludge process, enhancing Nitrogen removal. Waste activated sludge is thickened by gravity belt thickeners to 5 % solids and pumped along with the fermented primary clarifier solids to anaerobic digestion. Currently the digested solids are temporarily stored (2-5 days) and then dewatered by belt filter press (BFP). The dewatered biosolids range from 15 to 18% solids. BFP capture is low, around 85 to 89%. The Biosolids are temporarily stored onsite prior to land application as a class B Bio-solids. Harford County is requesting qualified firms provide a proposal for the scope of services outlined herein. This scope outlines the design and development of contract documents for construction improvements to the Sod Run WWTP dewatering building and processes. This project is the initial phase in a Biosolids Master Plan (B&V 2016) which has been developed to upgrade and maintain the Harford County biosolids handling facilities concurrent to the changing MDE biosolids regulations.