Aemetis, Centuri Sign $27 Million Deal to Build RNG Systems for 15 California Dairies
(P&GJ) — Renewable fuels company Aemetis Inc. has signed a $27 million equipment agreement with infrastructure contractor Centuri Holdings to build gas cleanup systems for 15 dairy digesters in California.
The agreement, part of Aemetis Biogas’ broader Central Digester Project, is expected to accelerate RNG production from the 50 dairies that have signed onto the program. Aemetis said 16 dairies are expected to be operating this summer, supported by a 36-mile pipeline network and a central biogas-to-RNG facility already connected to PG&E’s utility gas pipeline.
“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,” said Eric McAfee, Chairman and CEO of Aemetis. “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.”
“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,” added Dylan Hradek, President of US Gas at Centuri. “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.”
Aemetis is scaling up a number of low-carbon infrastructure projects in California’s Central Valley. These include:
- Expansion to 50 dairy RNG digesters, aiming to generate over 1 million MMBtu of RNG annually.
- A mechanical vapor recompression system at its Keyes ethanol plant, expected to generate $32 million in additional annual cash flow starting in 2026.
- A carbon sequestration project at its Riverbank site capable of storing 1.4 million tons of CO₂ per year.
- A proposed 78 million gallon-per-year sustainable aviation fuel and renewable diesel plant, which has secured key air permits and approvals.
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