A Greener Future for The City Of Raleigh - Turning Biosolids Into Vehicle Fuel


  • Michael Bullard, Hazen & Sawyer
  • Greg Knight, Kent Lackey, Christine Polo, Jay Kemp - Black & Veatch
  • Aaron Brower, TJ Lynch - City of Raleigh

The City of Raleigh is progressing with a Bioenergy Recovery Program to convert biosolids primarily generated at the Neuse River Resource Recovery Facility into a Class A product for beneficial use and resource recovery via land application and to make beneficial use of the biogas generated in anaerobic digestion for use as vehicle fuel.

Historically, biogas produced from anaerobic digesters at wastewater treatment facilities has predominantly been used in boilers, with any surplus flared, or used in reciprocating engines (or turbines) to produce electricity. In some cases it has been used to drive plant equipment such as pumps and aeration blowers.

Recent advances in gas upgrading technology mean that conversion of biogas to renewable natural gas (RNG) for pipeline injection or, following compression, to compressed natural gas (CNG) for vehicle fuel are now very viable alternatives to more traditional combined heat and power (CHP) applications.

For more information, please contact the author at mbullard@hazenandsawyer.com.

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