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Aemetis completes Keyes RNG plant commissioning

Aemetis completes Keyes RNG plant commissioning
Aemetis, Inc. has completed commissioning and testing of its US$12 million biogas upgrading facility at its Keyes ethanol plant site near Modesto, California (CA). The company expects to begin injection of biomethane (aka renewable natural gas - RNG) into the Pacific Gas & Electric Co (PG&E) gas pipeline in May 2022 (photo courtesy Aemetis).

US-headed renewable fuels developer and producer Aemetis, Inc., has announced that it has completed successfully completing testing of its U$12 million dairy biogas-to-renewable natural gas (RNG) upgrading and compression facility for the Aemetis Biogas Dairy Digester Project in California (CA).

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Last month, Aemetis subsidiary Aemetis Biogas began commissioning and testing operations of the US$12 million biogas upgrading facility at the Aemetis Advanced Fuels ethanol plant site near Modesto in California (CA).

The facility will convert dairy biogas into renewable natural gas (RNG) for injection into the Pacific Gas & Electric Co (PG&E) gas pipeline interconnection unit located at the Keyes ethanol plant site.

According to a statement, the company has now achieved a “significant milestone” by successfully completing testing of the US$12 million dairy biogas-to-RNG upgrading and compression facility for the Aemetis Biogas Dairy Digester Project in California.

Completing the construction and successful testing of the biogas upgrading and compression facility is a significant milestone that will allow Aemetis to sell -426 carbon intensity RNG to fleet customers across California, said Eric McAfee, Chairman, and CEO of Aemetis.

RNG deliveries to begin in May

The full system mechanical commissioning process for the biogas-to-RNG facility has been completed.

PG&E is now conducting final tests of the utility gas pipeline interconnection unit that is already constructed, which will enable the injection of utility-grade RNG into the PG&E gas pipeline for delivery to customers. The first RNG deliveries are expected in May 2022.

In addition to our two operating dairy digesters and 16 miles of biogas pipeline, Aemetis continues to be on schedule to add five dairy digesters to our network this summer to meet the increasing demand for lower cost, low emission, carbon-negative RNG to replace petroleum diesel in trucks, buses, and other heavy transport vehicles, said Eric McAfee.

On-time and within budget

According to Aemetis, site development, engineering, permitting, construction, and successful operational testing of the Aemetis biogas upgrading facility and the PG&E interconnection unit were achieved over a three-year period within the original project budget.

When fully built out, the planned 60+ dairies in the estimated US$380 million Aemetis biogas project are expected to capture more than 1.6 million MMBtu of dairy methane and reduce greenhouse gas (GHG) emissions equivalent to an estimated 5 million tonnes of carbon dioxide (CO2) annually.

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