Aemetis is producing dairy biogas from the first two dairies in a 17 dairy digester biogas project in California, US.
The below-zero carbon intensity gas is used to produce fuel ethanol at the Aemetis Advanced Fuels Keyes facility. Aemetis also produces high-grade sanitiser alcohol and various feed products at the plant.
Eric McAfee, chairman and CEO of Aemetis, said: “In just over one year, Aemetis Biogas has built and commissioned two dairy digesters and four miles of private pipeline that is now producing below-zero carbon intensity biogas, used in the production of transportation fuel.
“We are pleased with the rapid scale-up of our dairy methane to renewable natural gas (RNG) project and rapid progress toward producing large volumes of RNG for transportation fuel.
“With the addition of 15 more dairy digesters, gas upgrading, utility interconnection, and dispensing RNG to truck fleets, Aemetis is well positioned to capitalise on the large below-zero carbon transportation market. This project provides value to local dairies by creating a new revenue stream while meeting new California requirements for a significant reduction in methane emissions from dairies.”
In December, Aemetis plans to begin construction of a gas upgrading system to convert dairy-derived biogas into RNG for injection into the PG&E pipeline, or utilisation as renewable compressed natural gas (R-CNG) at its onsite R-CNG fuelling station.
In 2021, the firm plans to continue developing the next 15 dairy digesters and related pipeline in the 17 dairy digester RNG cluster located near the Aemetis Keyes plant. The project funding plan has no debt and more than $65 million (€54.9 million) of preferred equity investment and grants.