• Main Office
• Southern Virginia Office

• Home
• About
• Projects
• Bid List
• Careers
• Contact
• Links

Blue Plains Additional Dewatering Facility

Blue Plains Additional Dewatering Facility Wastewater Treatment Plant

Main Office

Project Location: Washington, DC

Contract Amount: $61,800,000

Project Description:
This large addition/retrofit project in Washington, D.C. was a major undertaking. It consisted of the provision of seven high performance dewatering centrifuges, modifications to existing centrifuges, and provision of two biosolids storage silos for direct loading to trucks. Also included were feed pumps, grinders, centrate systems, conveyor systems, lime transport and mixing systems all to support and serve the centrifuges and silos. Additionally, the project included upgrades to the administration and control areas of the Solids Processing Building and the addition of a multipurpose room.

The plant had to be kept in service 24 hours a day, seven days per week. Milestone dates were applicable.



Some of the work items included:

• Working in an existing occupied facility
• Phasing requirements
• Lead paint, asbestos & demolition
• Installation of temporary partitions
• Cast-in-place structural concrete
• Precast architectural panels
• Masonry cleaning, restoration and extension repairs
• Roofing rehabilitation
• Coiling doors
• Drywall, acoustical ceilings, and plasterwork
• Access flooring
• Elevators
• Sprinkler

Major pieces of mechanical and process equipment, which was furnished and installed included:

• Sludge/Lime Mixers
• Chopper Pumps, Centrate Pumps and Sample (Hose) Pumps
• Sludge Recirculating Pumps
• Chemical "R" System, including tanks, pumps, polymer units, aging tanks, dryers, modifications to existing tanks, and panels
• Pneumatic lime transfer system
• Odor Control System
• Screw Conveyors
• Sludge Silo System
• Instrumentation
• Centrifuges
• Balance
• Insulation
• Temperature controls
• Ductwork (HVAC & FRP)

Mechanical:

• Special pipes (Titanium, double containment, stainless steel, DIP)
• Pipe supports
• Air filtration equipment
• Tanks, pumps, chemical induction unit
• Balance, insulation, sheet metal