The Not-So-New New Renewable

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A manure and food waste-to-energy facility at Bar-Way Farm in Deerfield, Massachusetts. VANGUARD RENEWABLES

Biogas came to the attention to most of us contributing to this platform while in India. It has remained on our radar as an important, if quaint farmland quirky skunkworks. Thanks to Yale e360 for highlighting its emergence as a scaling alternative to other forms of natural gas:

Could Renewable Natural Gas Be the Next Big Thing in Green Energy?

For decades, small-scale biogas systems have collected methane from landfills, sewage plants, and farms. Now, in Europe and the U.S., the growth of this renewable form of natural gas is taking off as businesses capture large amounts of methane from manure, food waste, and other sources.

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A truck delivers food waste to an anaerobic digester at a Massachusetts farm. VANGUARD RENEWABLES

In the next few weeks, construction crews will begin building an anaerobic digester on the Goodrich Family Farm in western Vermont that will transform cow manure and locally sourced food waste into renewable natural gas (RNG), to be sent via pipeline to nearby Middlebury College and other customers willing to pay a premium for low-carbon energy.

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A covered lagoon manure digester on Van Warmerdam Dairy in Galt, California. MAAS ENERGY WORKS

For the developer, Vanguard Renewables, the project represents both a departure and a strategic bet. The firm already owns and operates five farm-based biogas systems in Massachusetts; each generates electricity on site that is sent to the grid and sold under the state’s net-metering law. The Vermont project, however, is Vanguard’s first foray into producing RNG — biogas that is refined, injected into natural gas pipelines as nearly pure methane, and then burned to make electricity, heat homes, or fuel vehicles.

“Producing RNG for pipeline injection and vehicle fueling is the evolution of where everything is going” in the biogas sector, says John Hanselman, Vanguard’s CEO. Continue reading