Advertisement Advertisement
Advertisement Advertisement

Aemetis receives LCFS pathway approval for dairy RNG

In the United States (US) Aemetis, Inc., a renewable natural gas and renewable fuels company focused on negative carbon intensity (CI) products, has announced that it has received certification from the California Air Resources Board (CARB) for a new Low Carbon Fuel Standard (LCFS) Tier 2 fuel pathway for the Aemetis Advanced Fuels Keyes ethanol production plant utilizing renewable dairy biogas as a process energy input. 

Aemetis owns and operates a 65 million (US) gallon (≈ 246 million litres) per year renewable ethanol production facility in Keyes, California (CA). The company has received certification from the California Air Resources Board (CARB) for a new Low Carbon Fuel Standard (LCFS) Tier 2 fuel pathway for the Aemetis Advanced Fuels Keyes ethanol production plant utilizing renewable dairy biogas as a process energy input (photo courtesy Aemetis).

The new pathway reduces the carbon intensity (CI) of Aemetis’ fuel ethanol from 67.3 to 65.6 utilizing dairy biogas from two dairies with an average CI score of negative 426 (-426).

Aemetis began operating two anaerobic dairy digesters and a 4-mile (≈ 6.4 km) private pipeline in September 2020 near the company’s ethanol biorefinery in Keyes, California.  The new ethanol pathway certification from CARB is effective as of October 1, 2020.

The Aemetis Central Dairy Digester Project is a collection of dairy lagoon anaerobic digesters that are built, owned, and operated by Aemetis Biogas LLC utilizing waste animal manure to generate renewable methane gas to produce negative carbon intensity RNG for transportation use to displace petroleum diesel fuel.

An estimated 25 percent of methane emissions in California are produced by dairy waste lagoons.

Once complete, the Aemetis Central Dairy Digester Project is expected to include over 30 dairy digesters in the current phase with plans to expand to more than 52 dairies, and utilize 36 miles (≈ 58 km) of private pipeline owned by Aemetis, a centralized gas clean up unit located at the Aemetis Keyes ethanol biorefinery, a Renewable Natural Gas (RNG) onsite fueling station, and interconnection to PG&E’s natural gas pipeline.

This is another significant step in our multi-year plan to de-carbonize the Keyes ethanol production facility. This CARB Pathway approval is our first utilization of negative CI dairy biogas to produce transportation fuel. The Aemetis Keyes biorefinery is expected to serve as the hub for the processing and distribution of our negative carbon intensity RNG and allow us to serve multiple markets with low or below zero CI liquid and gas renewable fuels.  We’d like to thank the staff at CARB for their diligent and professional work. We look forward to working with them as we rapidly expand the deployment of our negative CI transportation fuel, said Eric McAfee, Chairman and CEO of Aemetis.

The Company plans to begin construction of the next five dairy digesters and the additional 32 miles (≈ 51.5 km) of biogas pipeline in the second quarter of 2021, with five more dairy digesters set to begin construction in the third quarter of 2021 and five digesters beginning in Q1 2022, for a planned total of seventeen dairy digesters and a 35-mile (≈ 56.3 km) biogas pipeline in operation by Q2 2022.

We're using cookies. Read more