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 ...