6-ITB-26-00312 Attachment C - NWRWRF Process Flow Diagram.pdf

This is a process flow diagram for the Northwest Regional Water Reclamation Facility (NWRWRF) operated by Hillsborough County, Florida, depicting the advanced wastewater treatment process as of October 2010. The diagram illustrates the complete treatment pathway from influent through the headworks, anoxic basins, fermentation basin, aeration basin, clarifier, deep bed filters, ultraviolet disinfection, and ultimately to either reclaimed water storage tanks for reuse customers or surface water discharge. The facility incorporates multiple treatment stages including two anoxic basins for nutrient removal, aeration for biological treatment, and ultraviolet disinfection as a final barrier. The diagram also shows auxiliary processes including a biosolids management facility connection, sludge handling through a waste sludge holding tank, grit and screenings removal, spent backwash water management through reject water basins and holding tanks, and odor control systems. The facility supports reclaimed water distribution to reuse customers while managing byproducts and maintaining environmental compliance.

This process flow diagram serves as supporting documentation for the related county solicitation for centrifuge mobile sludge dewatering unit equipment rental across multiple Hillsborough County wastewater treatment facilities over a five-year contract period valued at $6,623,000. The diagram demonstrates the scale and complexity of the NWRWRF operations, identifying the specific treatment infrastructure where mobile dewatering equipment would integrate to support sludge handling and biosolids management processes. The inclusion of this facility schematic in the bid package indicates that prospective vendors must understand the facility's operational requirements and be capable of deploying compatible mobile centrifuge equipment for on-site sludge dewatering support.