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Advanced Biofuels USA Policy Statements and Handouts
by Erin Voegele (Ethanol Producer Magazine) … McAfee (Eric McAfee, CEO of Aemetis Inc.) provided an update of the many improvement projects underway at the Keyes plant that will reduce the carbon intensity (CI) of the fuel it produces, including the use of renewable natural gas (RNG), a membrane dehydration unit, a solar micro grid array with battery backup, and a mechanical vapor recompression (MVR) system.
RNG used at the plant is being generated through a dairy biogas project under development by Aemetis. In September 2020, the company completed construction of the first two out of 17 planned covered lagoon digesters, including on-site dairy biogas cleanup and pressurization. The Keyes plant is now using that RNG to offset natural gas usage. The remaining 15 dairy digester projects are expected to be complete by mid-2022. RNG produced through the dairy digester project will also be used as transportation fuel.