Anaerobic Digestion



Our farmers are an integral part of helping us Reimagine Waste—they care as much about the environment as we do, which is why we’re proud to partner with various farmers throughout the nation.


Organic waste—reimagined

At Brightmark, we capture the methane released from organic waste and convert it into renewable natural gas, better known as “RNG.”

Organic waste has evolved into a resource we can use for various new things—including heating our water, powering our homes, and running our cars—all helping lower greenhouse gas emissions and protect the planet.

By working with prominent farmers all over the United States, we started to create renewable natural gas. This renewable power was consciously developed with nature and the world around us in mind.


Reimagining organic waste


“Brightmark has been a good partner in the development of this project. This technology now also allows us to convert manure to energy and improve the environment.”


– Woody Larson // Larson Dairy

Overhead view of dairy farm

CARB certified

Our renewable natural gas projects decrease the carbon intensity of transportation fuels and are California Air Resources Board (CARB) certified.

EPA certified

Learn about our RNG projects that participate in the Renewable Fuel Standard Program—reducing greenhouse gases and expanding the nation’s renewable fuels sector.

We're unwasting waste.
How renewable natural gas is made.

Renewable natural gas (RNG) is natural gas produced from organic waste like food waste and animal plant-based materials. The significant sources of RNG are landfills, animal manure, and solid waste extracted during wastewater treatment.

The gas is considered “renewable” because it is created by continuously produced waste and is naturally occurring as part of the decomposition process. Anaerobic digestion technology captures raw biogas, cleans, upgrades, and compresses it into RNG.

To date we've reduced
tons of CO₂eq through our RNG projects

Our projects

Reducing greenhouse gas emissions

Renewable natural gas offers myriad climate benefits throughout its life cycle compared to traditionally captured gas and other fuels, drastically reducing the greenhouse gases (GHGs) associated with agriculture and wastewater treatments. During anaerobic digestion, methane is captured as biogas and converted rather than released directly into the atmosphere. When used in vehicles, natural gas emits 6% to 11% lower GHGs than gasoline throughout the fuel life cycle. Research shows that when climate benefits are considered together, RNG from dairy manure can reduce GHG emissions up to 400% when replacing traditional vehicle fuels.


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