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US Digester Marekt (Including CA)

The US non-landfill biogas anaerobic digester fleet continues to grow and attract investment. Industry group statistics* on facilities generating biogas in the US (including California) as of the end of 2025 describe a significant economic sector with great growth potential:

The 10%-25+% increases in biogas yield and total methane capture produced by iBioBoosters at industrial digesters in Italy and China have demonstrated iBB System performance and value.

Bio-Tronic Energy Co. was formed to introduce innovative iBB Systems and services to the growing US and California digester biogas industry and related markets: cumulative public / private investment in anaerobic digesters is an estimated USD25 billion and rising, to support multiple public goals:

  • GHG/methane emission reduction
  • local and regional air and water quality, public health
  • renewable energy displacement of fossil fuels
  • agricultural economy
  • municipal organic waste diversion from landfills
    • circular economy resource efficiency systems

The iBB process — directly and safely addressing each digester’s unique microbial community responsible for producing its biogas – can increase the value and leverage of digester and biogas / biomethane system financial investments past and future.

Collectively, improvements in digester system efficiency can promote attainment of the public goals.

The U.S. / California Market for Anaerobic Digesters and iBB Systems Is Still Growing

U.S. (Including California) Anaerobic Digesters

Described broadly, there are three types of anaerobic digesters in the US, including California.
  • ON FARM ANAEROBIC DIGESTERS:
    631 (32%) digesters on farms (496 on dairy farms)
  • WASTEWATER TREATMENT PLANTS WIITH ANAEROBIC DIGESTERS:
    1,231 (62%)
  • STAND ALONE FOOD WASTE PROCESSORS:
    124 (6%)
    Estimated total cumulative investment in US anaerobic digesters through 2025: $24.7 billion
  • LONG-RANGE ESTIMATE OF US NATIONAL POTENTIAL FOR ADDITIONAL ANAEROBIC DIGESTERS (INCLUDING CALIFORNIA):
    Over 16,000 potential additional non-landfill biogas capture facilities (Anaerobic Digesters)
    • 11,200 on farms
    • 3,750 at wastewater treatment plants
    • 1,370 food waste processors.

    * Source: https://americanbiogascouncil.org/wp-content/uploads/2026/02/ABC-Biogas-in-America-2026-Report.pdf

California Anaerobic Digester Market

Bio-Tronic Energy Co. initially focuses its US activities at digesters in California and at non-California digesters connecting their biomethane to California natural gas pipeline networks via interstate pipeline and book and claim accounting.

Since 2006, California has passed laws and carried out policies setting goals for reduction of methane emissions in the state. The measures have created programs and incentives for building and operating anaerobic digesters and have established increasingly mature infrastructure and markets supporting the biogas/biomethane (renewable natural gas) economy.

To date, priorities have emphasized getting new digester projects financed, built, and in operation, rapidly advancing progress toward methane capture, organic waste management, air and water quality protection, and renewable energy goals.

Opportunities now have emerged, as well, for improving digester system efficiency in furtherance of the public goals and to the potential benefit of digester investors, owners/operators, and related industry participants.

Collectively the combination of incentives for development and sustained use of ADs has resulted in a robust and still growing California anaerobic digester fleet:

Estimate:1,986 Anaerobic Digesters (Currently Are Operating or Are in Development in the U.S. (Including California)

California Anaerobic Digesters

  • Described broadly, there are three types of anaerobic digesters in California.
  • 168 operating agricultural manure digesters +75 in development
  • Estimate: 80-120 Water Resource Recovery Facilities (WRRFs) and WWTPs biosolids anaerobic digesters; a few with food/FOG co-digestion, + 15-20 planned
  • Estimate: 18-22 stand-alone, high-diversion urban green waste / food waste digesters, +20-25 in development