Ambient Carbon Destroys 90% of Dairy Barn Methane in Field Trial

COPENHAGEN, Denmark, Aug. 12, 2025 /PRNewswire/ -- A field trial in Denmark shows Ambient Carbon's Methane Eradication Photochemical System (MEPS) eliminated up to 90% of dilute methane emissions from dairy barn air. MEPS uses a patented gas-phase photochemical process to break down methane.

It's the first real-world validation of a scalable technology for eradicating methane emissions from livestock barns, evidence that their emissions can be remediated at commercial scale.  

Conducted in a 250-cow, open-sided dairy barn at Hofmansgave Foundation in Denmark, the trial tested a MEPS unit in a 40-foot shipping container (previous tests used a smaller laboratory prototype).  

"The system successfully oxidized methane from dairy barn ventilation air across varying concentration levels, proving that MEPS works under real agricultural conditions with co-pollutants present," said Matthew S. Johnson, Ambient Carbon Co-founder & Chief Science Officer. "At concentrations from 4.3 ppm to 44 ppm, MEPS eradicated up to 90% of inlet air methane." 

The only highly effective, commercially viable solution for eradicating methane at concentrations below 1000 ppm, MEPS is a non-invasive technology which does not disturb cows, milk production, or barn operations. In addition to destroying methane, it also removes ammonia and other odors while generating sterile water vapor and fertilizer which can cut farmers' operating costs.  Modular design allows MEPS to be deployed in barns of various sizes, as well as manure storage facilities, biogas plants, and wastewater treatment plants. 

The MEPS field trial was supported by Danone North America and Benton Group Dairies, a major Danone North America supplier. Other collaborators include the Hofmansgave Foundation and PERMA Project partners Arla, the University of Copenhagen, Aarhus University, and SKOV, with additional support from Innovation Fund Denmark for the PERMA project via AgriFoodTure. 

"We're very pleased with these initial results, as there is a great need for regenerative agriculture technologies like MEPS to strengthen the future of farming," said Jessie Copeland, Head of Regenerative Agriculture at Danone North America. "The success in Denmark paves the way for further strategic collaborations between Danone North America and Ambient Carbon, reinforcing our shared commitment to enhancing farmer and supply chain resiliency—and building a future where the food system can thrive." 

"Benton Dairies places a substantial emphasis on conservation," said Chris Williams, Conservation Lead at Benton Dairies. "We are committed to increasing our positive environmental influence while reducing greenhouse gas emissions. MEPS is a non-invasive technology that will remove more methane from our farms than any available technology we've encountered. We are excited to work alongside Ambient Carbon to push the boundaries of what sustainable milk production can be."  

"This field demonstration validates our approach and shows that we can achieve the performance metrics needed for widespread adoption across the agricultural sector," said Dave Kenney, CEO of Ambient Carbon. "Support from partners like Danone has been essential in reaching this pivotal moment." 

The full version of this release is posted here. 

Source: Ambient Carbon  

Contact : Paul Carlson, [email protected], +1 314.225.8802 

SOURCE Ambient Carbon