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Robeson County Landfill – St. Pauls, NC

Robeson’s waste-to-energy project is using biogas to produce enough electricity to power more than 900 homes. The 450 acre landfill contains over 48 wells at a depth of 35 feet which yields approximately 600+ standard cubic feet per minute of biogas. When the site expanded to add a second engine they also decided to cut down on their maintenance costs by adding a GraniteFuel SRT at the same time.

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The Site

  • Gas Source:
  • Landfill Gas
  • Current Gas Flow:
  • 600 – 800 scfm
    (future gas flow: 1200 scfm)
  • Gas Temperature:
  • Approx. 75°F (24°C)
  • Gas Pressure:
  • 6.5 PSI
  • Gas Usage:
  • Power Generation
    2x GE Jenbacher 320 GS-LL 1090 kW
  • Siloxane Concentration:
  • 133 mg/m3 (9.3 ppmv)

SRT System

  • System Configuration:
  • Dual Vessel SRT
  • System Footprint:
  • W: 200” x L: 200” x H: 82” (3 skids)
  • Regeneration Timeline:
  • Approx. 6-8 hrs per 72 hour period
  • Regeneration Air:
  • Vented to atmosphere through flare
  • Pressure Drop:
  • 0.5 PSI

Features

  • Condensate removal (drip trap with day tank) tied to leachate
  • Expandable capacity without any future onsite modifications
  • Residual gas reintroduced into system
  • System built out of 316 stainless steel
  • Modular skids designed for quick installation

Additional Projects

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Lindsay Landfill
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Golden Triangle Landfill
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