Success Stories

Mill Valley, US

Agriculture continually evolves 

BIOGEST America Inc. signed a Master Service Agreement with Brightmark RNG Origination LLC, leading the way for BIOGEST to lend our expertise as a technology vendor for the Mill Valley RNG project.

Providing the engineering, design, and equipment for a 2-tank system, alongside Brightmark and their partners, construction works are underway at the Milbank, SD-based dairy.


The Mill Valley RNG project is part of a growing interest of dairymen in South Dakota, to continue to be stewards of the land, and make a sizeable impact on global sustainability.

By diverting the manure on-site, the facility will continuously produce renewable natural gas each year and will provide organic fertilizer for farming operations as a by-product of the anaerobic digestion process.


Mill Valley RNG Plant

  • 70,226 MMBTU/year (138 Nm³/h)
  • Over 178,000 tons of cattle slurry are processed per year
  • Supplied by a single dairy farm in Milbank, South Dakota
  • Providing fuel for the California Natural Gas Transportation industry

Project timeline

  • April, 2022: Break ground

  • 6 months of construction

  • Q1 2023: First gas production

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