The Demeter Project

About the project

The Demeter renewable natural gas (RNG) anaerobic digestion project in Madison, Wisconsin, converts 90,000 gallons per day of dairy waste from three area farms into renewable natural gas each year. The digester upgrades were completed in June 2020.

Project benefits

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GHG REDUCTIONS

The facility will offset greenhouse gas emissions each year.
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RESOURCE RECOVERY

Recovering and processing manure from the farms will prevent excess nitrogen and phosphorus from escaping into local air and water, reducing phosphorus runoff alone by 60%.
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WASTE TO NEW PRODUCTS

Clean Fuel Partners provides operations and maintenance support for the digester. The project was also developed in close coordination with Dane County, Wisconsin. The renewable natural gas collected from the anaerobic digester is transported to the county’s landfill gas processing facility and injected directly into an interstate pipeline.

“As a participating farm, we are excited to have Brightmark as a partner in the anaerobic digestion of the manure from our cows. This agreement will help local farms continue to be environmentally friendly to our community and help us to stay in compliance with environmental regulations. We have always taken pride in being excellent stewards of land conservation and ensuring our land is a safe environment for our neighbors.”

– Chuck Ripp of Ripp’s Dairy Valley LLC

Partners

Clean Fuel Partners provides operations and maintenance support for the digester. The project was also developed in close coordination with Dane County, Wisconsin. The renewable natural gas collected from the anaerobic digester is transported to the county injected directly into an interstate pipeline.

Clean Fuel Partners logo
County of Dane, Wisconsin logo

Transform your waste

Brightmark owns and operates over 30 renewable natural gas projects working with 40 farms across the United States, all of which have been launched in the past three years alone, making the company an emerging leader in the rapidly growing RNG industry. If you’d like to partner on a project with us, please fill out this form to get started!
cows on farm

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