WWM Watch World Media
Redwood City, California – June 2026 — A California-based energy startup has announced a major milestone in sustainable aviation, successfully converting raw agricultural biogas produced from dairy cow manure into sustainable aviation fuel (SAF) in what the company describes as a world-first end-to-end process.
Circularity Fuels completed a six-month pilot project at a dairy farm near Madera, California, producing a drop-in jet fuel that meets strict aviation standards and can be used with existing aircraft engines and fuel infrastructure.
Turning Farm Waste Into Aviation Energy
The breakthrough uses biogas generated from dairy manure through anaerobic digestion — a process that captures methane that would otherwise contribute to greenhouse gas emissions.
The company’s modular Ouro Reactor technology converts the raw biogas directly into synthesis gas before transforming it through Fischer-Tropsch synthesis into renewable jet fuel.
Unlike many traditional SAF pathways, the system avoids several expensive processing stages by working directly with unrefined farm-generated biogas, potentially improving efficiency and reducing production costs.
A New Opportunity for Farmers
The technology could provide dairy farmers with a new source of revenue by transforming waste management into renewable energy production.
Supporters say the approach could help address two major challenges facing the aviation industry: reducing emissions and securing enough sustainable feedstock to meet growing demand.
The resulting fuel is designed to be compatible with current aviation systems, allowing airlines to adopt cleaner fuel options without major infrastructure changes.
Climate and Industry Impact
Sustainable aviation fuel remains a key focus as airlines and governments look for ways to reduce aviation emissions.
Fuel created from captured agricultural methane has the potential to deliver significant lifecycle emissions reductions compared with conventional fossil-based jet fuel, while also reducing methane releases from agricultural operations.
Looking Ahead
Circularity Fuels says it is now focused on scaling the technology toward commercial deployment, with potential future applications beyond aviation fuel.
The development highlights the growing role of innovative waste-to-energy solutions in the transition toward cleaner transportation and a more circular economy.
WWM Watch World Media will continue covering breakthroughs shaping the future of technology, energy, and sustainability.