Circularity Fuels Raises $7M for Dairy Jet Fuel

The seed round will support development of jet fuel produced from dairy manure biogas using the company's electrified reactor.

Updated on Nov. 6, 2026 in Electric Vehicles

Wide photograph of a steel reactor vessel and pipe on flat farmland beside a red dairy barn, with a manure lagoon in the foreground under warm late-afternoon light. — Circularity Fuels raised $7 million in a seed round led by Trucks Venture Capital and DCVC to turn dairy manure biogas into jet fuel. AI Illustration. Upload story photo >

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Circularity Fuels closed a $7 million seed round led by Trucks Venture Capital and DCVC to develop jet fuel from dairy biogas. The company says it has converted raw dairy biogas into jet fuel meeting ASTM D7566 Annex A1 specifications.

Why it matters

Large US livestock operations produce nearly a trillion pounds of manure a year, yet fewer than 6% of the resulting biogas is captured. Converting that biogas to sustainable aviation fuel could tap a large unused resource for the aviation sector.

The six-month validation pilot at a dairy near Madera, California, produced jet fuel meeting ASTM D7566 Annex A1 specifications, and nearly $7 million of the company's roughly $17 million total funding came from grants. The planned commercial plant would produce 75 barrels per day.

The players

Circularity Fuels

A company developing jet fuel production from dairy biogas using an electrified reactor and modular on-farm systems.

Trucks Venture Capital

A venture capital firm focused on transportation and mobility technology that led the seed round.

DCVC

A deep-tech venture capital firm that co-led the seed round for Circularity Fuels.

The details

Circularity converts dairy manure biogas into sustainable aviation fuel using its electrified Ouro reactor, with modular systems designed to produce liquid fuel on the farm. Over the next 18 months, the new funding will support a demonstration plant producing jet fuel daily, and the company will seek airline fuel contracts needed to begin construction of a commercial plant.

June: Circularity announced that its converted jet fuel met ASTM specifications.
Six-month pilot: Conversion results were validated at a dairy near Madera, California.
Next 18 months: Funding supports a demonstration plant and commercial plant engineering design.

Roadmap

The company is pursuing a dairy-biogas pathway that must meet ASTM D7566 Annex A1, the specification governing sustainable aviation fuel blends. Its projected commercial capital costs of about one-fifth those of European jet fuel plants position it against established production routes in that market.

If the commercial plant is built, dairy-derived sustainable aviation fuel could become a supply option for airlines seeking lower-carbon jet fuel. The timeline depends on securing airline fuel contracts, which the company says it still must pursue.

The takeaway

Dairy manure represents a large, largely uncaptured source of biogas that could feed sustainable aviation fuel production. Readers tracking aviation decarbonization should watch whether airline contracts materialize to support commercial-scale plants.