From low-carbon ethanol to dairy biogas and other advanced biofuels, our integrated facilities are providing quality fuels from today’s lowest carbon sources.

Keyes Low Carbon Ethanol

Aemetis owns and operates a 65 million gallon per year low carbon ethanol production facility located in Keyes, California. In addition to renewable fuel ethanol, the Keyes plant produces wet distillers grains, distillers corn oil, and condensed distillers solubles, all of which Aemetis sells to local dairies and feedlots as animal feed. Aemetis supplies 80 local dairies and approximately 100,000 cows with over 400,000 tons of animal feed annually. Through a partnership with Messer Gas, Aemetis also supplies over 140,000 tons of liquified CO2 to the beverage, food, and industrial sectors.

Current and planned upgrades include a [1.5 Mw size] solar microgrid with battery storage, Zebrex(C) ethanol dehydration unit, mechanical vapor recompression (MVR), and high-efficiency heat exchangers.

By converting the major processing equipment to renewable electricity, Aemetis expects to reduce the use of petroleum natural gas at the Keyes by 90% by 2025. Located above massive shale deposits, the Keyes facility is the future home to our carbon capture and sequestration facility.

Biogas Digesters

Aemetis Biogas constructs biomethane anaerobic digesters at local dairies near the Keyes Plant. The digesters are connected via our private pipeline to flow dairy biogas to a gas cleanup and compression located at our ethanol plant. We completed Phase I construction in 2020, which included the first two dairy digesters and four miles of pipeline. Phase II extends this pipeline to an additional 17 dairies and adds 32 miles of private pipeline. Over 50 local dairies have signed 25-year off-take agreements and can eventually be connected by our private pipeline.

Once the biomethane from the dairies is received, we remove the impurities and convert the methane to renewable natural gas. Then we inject it into the local gas utility pipeline to service local trucking fleets or use it to power the plant.

The carbon intensity of this RNG is – 416, providing some of the lowest carbon-negative RNG available. When Phases I-III are complete, we expect to produce 450,000 MMBTU of RNG per year. When the entire network is fully built-out, we expect to produce over 1.5 million MMBTU annually.

India Biodiesel

Aemetis owns and operates the Kakinada Plant with an installed capacity of 150 thousand metric tons per year, or about 50 million gallons of biodiesel production per year. The Kakinada Plant is one of the largest biodiesel production facilities in India, based on installed capacity. This plant is capable of processing a variety of vegetable oils, animal fat, and waste feedstocks into biodiesel that meet international product standards.

The Kakinada Plant also distills the crude glycerin byproduct from the biodiesel refining process into refined glycerin. DeSmet-Ballestra, known for the best biodiesel production technology available, supplied the design powering the plant.

Located in Kakinada, Andhra Pradesh, this facility sells biodiesel primarily to fuel stations, mining and industrial customers. We also sell refined glycerin to customers in the pharmaceutical, personal care, paint, and adhesive industries.

The Indian government requires 5 percent biodiesel for all diesel fuel by 2030, a one billion growth from the current 250-MGY industry capacity. Andhra Pradesh State Road Transport Corp. selected this facility to supply approximately 800,000 gallons per month of biodiesel to fuel public transport buses.

This location was amongst the first plants to commence biodiesel production in India.

Carbon Zero 1

Aemetis is developing “Carbon Zero” biofuel production plants to produce biofuels such as renewable jet and diesel fuel utilizing cellulosic hydrogen and non-edible renewable oils sourced from existing Aemetis biofuel plants and other sources. The first plant in Riverbank, California, “Carbon Zero 1”, is expected to use hydroelectric and other renewable power available onsite to produce 90 million gallons per year of jet fuel, renewable diesel, and other byproducts. The plant is expected to supply the aviation and truck markets with ultra-low carbon renewable fuels to reduce greenhouse gas (“GHG”) emissions and other pollutants associated with conventional petroleum-based fuels.

We have signed agreements with local orchards to secure 130,000 tons of wood waste per year. We expect operations to begin in late 2023, with the production of 90-MGY by 2025.

Carbon Capture and Sequestration Injection Wells

Our Keyes and Riverbank facilities will also be home to two carbon capture and sequestration (CCS) injection wells. These have a planned capacity of two million metric tons of CO2 a year. The Central Valley is home to a large shale deposit, ideal for CO2 storage.

The two million metric tons of CO2 will come from two sources: 400,000 tons from our biogas and biofuels plant operations and another 1.6 million from CO2 supplied by other fuel producers in California.

There are currently few California CCS sites in active development and no facilities in current operation. Aemetis is poised to be on the front line of carbon capture and sequestration.

Research and Development

Research activities at Aemetis Technologies are conducted in our lab located within the University Enterprise Labs (UEL) LifeScience Incubator in Minnesota. The lab has advanced chemical measurement and research technologies to develop innovative industrial organic chemical solutions. For the fermentation process development, Aemetis Technologies has three Bioflo 120 controllers for monitoring and controlling process parameters such as pH, temperature, dissolved oxygen, agitation, aeration, and gas blending. The fermenters are also accessorized with BlueSens off gas monitoring to measure the composition of effluent gas.

With its state-of-the-art fermentors, controllers, and production space, the lab partners with various academic, industry, and government agencies to test and develop patent and patent-pending processes for sugar extraction from waste materials. Aemetis Technologies is proud to partner with the strong, vibrant biotech community from universities and local companies.