In the United States (US), Aemetis, Inc., a renewable natural gas and renewable fuels company focused on low and negative carbon intensity renewable fuels, has announced that its Aemetis Biogas subsidiary has signed a US$27 million equipment agreement with Centuri Holdings, Inc., a US$2.6 billion infrastructure services contractor, to build biogas cleanup systems for 15 dairy digesters.
According to a statement, this signed agreement and expected future agreements with Centuri will enable Aemetis Biogas to rapidly scale up the construction of dairy digesters to produce renewable natural gas (RNG) for a total of 50 dairies that have already been signed by Aemetis Biogas.
Our expanding strategic relationship with the experienced team at Centuri ranges from this agreement for biogas equipment to plans for construction management and pipe assembly to build upcoming energy efficiency, carbon sequestration, and other projects. We expect that Centuri will play a key role in building Aemetis projects on time and on budget, given their expertise in constructing industrial facilities, large-scale gas pipeline projects. and utility electrical systems, said Eric McAfee, Chairman and CEO of Aemetis.
This summer, 16 dairies are scheduled to be operating in the Aemetis Biogas Central Digester Project near Modesto, California (CA).
Some 36 miles of biogas pipeline and a central biogas-to-RNG production facility are already in operation, delivering RNG into the PG&E utility gas pipeline.
Centuri’s vast utility distribution expertise includes a growing number of renewable natural gas projects in multiple geographies, making the work with Aemetis a natural fit. We expect to add significant value to upcoming projects at the Riverbank site and to support their ongoing work and plans to deliver innovative, renewable energy solutions across their portfolio, said Dylan Hradek, President of US Gas at Centuri.
Aemetis’ renewable energy and energy efficiency projects include:
- The expansion of dairy RNG production to generate more than 1 million MMBtu of RNG from 50 dairies that have signed agreements;
- The Keyes ethanol plant mechanical vapor compression (MVR) system, which is expected to generate US$32 million of increased annual cash flow starting in 2026;
- The Riverbank carbon sequestration project is to inject 1.4 million tonnes of carbon dioxide (CO2) per year underground;
- The 78 million (US) gallon (≈ 295.2 million litres) per year sustainable aviation fuel (SAF) and renewable diesel plant, which has already received the Authority To Construct air permits and the other key approvals; and
- Negotiations are underway for other large-scale industrial and electrical projects at the Riverbank site.
