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Case Study
Community-scale dairy digester serving multiple farms in Vermont's Northeast Kingdom, demonstrating the viability of shared anaerobic digestion infrastructure for small dairy operations.
The Challenge
Small dairy farms in Vermont's Hardwick area individually lacked the scale to justify anaerobic digester investment, yet collectively faced mounting pressure from nutrient management regulations and rising energy costs. The community needed a shared digester model that could accept manure from multiple farms while generating enough biogas to make the economics work at a community scale.
Our Approach
EFI installed the digester cover and containment system for Vermont's Hardwick community digester, one of the early community-scale dairy digester projects in New England. The system accepts dairy manure from multiple area farms, processes it through anaerobic digestion, and captures biogas for energy generation. The cover and liner system was designed for Vermont's harsh winter conditions including heavy snow loads and freeze-thaw cycling.
Outcomes
“None of our farms could afford a digester alone, but together it works. EFI built a system that handles Vermont winters and keeps running when other equipment gives up.”
Community Digester Board Chair, Hardwick Community
Related Work
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