Circularity Turns Dairy Biogas into Jet Fuel


   
   HOUSTON, TX (DTN) -- Circularity Fuels announced Monday (6/15) it has 
completed the world's first end-to-end conversion of raw agricultural biogas 
into sustainable aviation fuel (SAF).

   Over a six-month pilot, the company drew biogas directly from a California 
dairy's manure digester and produced drop-in jet fuel meeting ASTM D7566 Annex 
A1 specifications -- the standard required for commercial aviation use.

   Circulatory Fuels expects to break ground on its first commercial site in 
2027, targeting agricultural biogas resources across the United States, Latin 
America, and Europe, according to the company statement.

   The pilot host, a dairy of more than 5,000 head near Madera, California, 
currently vents nearly all of its biogas to the atmosphere despite sitting in 
the heart of the country's largest dairy region.

   Circularity's two-reactor system ran on raw biogas -- roughly 65% methane 
and 35% CO -- drawn straight from the farm's digester and produced finished 
jet fuel blendable at up to 50% with conventional Jet-A for immediate 
commercial use, according to the company.

   The company says commercial-scale deployment can be achieved for under 
$100,000 bpd of installed capacity -- roughly one-fifth the capital cost of SAF 
plants currently under construction in Europe.

   The fuel also qualifies for the EPA's Renewable Fuel Standard and 
California's Low Carbon Fuel Standard. Global SAF production currently meets 
less than 1% of demand, and today's dominant feedstock -- used cooking oil, the 
majority of which is imported from China -- offers limited scale and does 
little to address energy security concerns.

    




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