Fort Hunter Liggett

FastOx System Installed at U.S. Army Garrison Fort Hunter Liggett in California.

Sierra Energy’s commercial-scale FastOx gasification demonstration facility is operational at Ft. Hunter Liggett in Monterey County, California. This facility provides Sierra Energy with the unique capability to demonstrate all core aspects of a high-temperature gasification system in a fully integrated facility from waste preparation and charging, through production of particulate and tar-free syngas.


The Ft. Hunter Liggett system allows Sierra Energy to test feedstocks and, through robust gas analysis and measuring equipment, generate operational data while demonstrating:

  • Efficient conversion of MSW and a range of biomass feedstocks
  • Robust gasifier operations including refractory durability and consistent slagging
  • Excellent cold gas efficiency
  • Syngas composition and volumes
  • Complete tar removal
  • Integration of Sierra’s gasifier with downstream processes
  • Use as a training facility for system operators


Sierra Energy recognizes the value and importance to customers of showing a system in operation. The company is proud to work with the US Army and California Energy Commission to make this a reality.

About Ft. Hunter Liggett

US Army Garrison Fort Hunter Liggett is in southern Monterey County, California. The Fort, named in 1941 after General Hunter Liggett, provides world-class training for combat support and combat service support units of the Army Reserve and offers training opportunities to all U.S. military components and those of allied nations. It is well suited to large-scale joint exercises. Fort Hunter Liggett is funded by the U.S. Army Reserve, under the command and control of the U.S. Army Installation Management Command, based at Fort Sam Houston, Texas.


The U.S. Army and Department of Defense are committed to eliminating their need for on-site waste management. The Base wanted to significantly lower the risk, cost, and carbon footprint related to the transporting and disposal of trash produced at the training facility. The FastOx gasification system on site has been designed to convert post-recycled, municipal solid waste generated on the garrison into electricity and fuels to help the military achieve its energy security and zero-waste goals. The Fort Hunter Liggett project sets a new mile marker on the US Army’s path to zero waste.

50 Hottest Projects - the Digest



10 tons


MSW & Biomass


~1 acre


Electricity & FTD

U.S. Department of Defense

The DoD invested $3 million into the Fort Hunter Liggett project as part of the U.S. Army’s net-zero waste initiative. The initiative requires the conversion of biomass and post-recycled waste into electricity.

CA Energy Commission

The California Energy Commission invested $5 million into the Fort Hunter Liggett project to demonstrate the production of ultra-low carbon renewable diesel fuel via the Fischer-Tropsch process.

U.S. Army

The U.S. Army sponsored the project at Fort Hunter Liggett to reach the Army’s responsible waste management goals while achieving energy security via renewable resources.

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This project has been reviewed and approved by the regional Water Quality Control Board and the Monterey Regional Air Pollution Control District. All appropriate environmental assessments have been completed.