California Startup Develops Sustainable Aviation Fuel from Manure
Circularity Fuels has launched the Ouro Reactor, a technology converting cow manure into sustainable aviation fuel (SAF) at low costs. This innovation could produce up to 42 million gallons of SAF daily, potentially meeting 70% of U.S. aviation fuel demand.

Circularity Fuels has introduced the Ouro Reactor, which efficiently converts cow manure into sustainable aviation fuel (SAF) at only 1% of the cost of traditional systems. This compact, fully electric device processes raw biogas on-site, eliminating the need for costly pre-treatments and making it up to 100 times cheaper to manufacture and operate compared to conventional reactors.
If widely deployed in dairy farms and waste treatment facilities, it could generate 42 million gallons of SAF daily, covering 70% of U.S. aviation fuel needs while also reducing methane emissions. The modular design enables decentralized production, allowing farms near airports to serve as renewable fuel stations.




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