Can Biodigesters Save America’s Small Dairy Farms?


Small dairy farms in Vermont teeter chronically getting ready to insolvency. Nearly half of Vermont’s dairies have gone out of enterprise up to now 10 years, primarily small farms. Things acquired even worse in the course of the pandemic, with risky costs and provide chain shifts. The sample is comparable amongst dairies all through New England. Stabilizing revenues would go a protracted strategy to preserving these creameries in enterprise and protect a threatened lifestyle—the small household dairy farm.

Vermont’s farms, together with small dairies across the nation, usually change enterprise methods to outlive. Some open farm stands. In the early 2000s, Vermont dairies surfed the natural milk wave, signing contracts with firms corresponding to Horizon Organic. Others turned to artisanal cheesemaking. Vermont’s family-owned dairies thrived for a number of years on the organic-artisanal mannequin. 

Last 12 months, nonetheless, Horizon Organic, owned by the French firm Danone, terminated 89 contracts in Maine, New York, Vermont and New Hampshire. Organic Valley, a farmer-owned consolidator, picked up many however not all of these contracts. And simply in time for this 12 months’s spring planting, nutrient prices rose about 80 p.c as a result of a lot of the nitrogen in business fertilizers is imported from Ukraine. These latest market disruptions emphasize the necessity for dependable dairy farm earnings.

RELATED: Farmers Struggle to Keep Up With the Rising Costs of Fertilizer

One strategy to construct regular farm income is to promote electrical energy to the grid. A renewable vitality generator referred to as a biodigester turns an issue (cow manure) into an answer (vitality and earnings). Biodigesters convert a slurry of cow manure into pure fuel, which then runs a turbine to supply electrical energy. Dairy farmers promote manure-generated electrical energy again to the grid, usually supported by a consumer-funded bonus for every kilowatt-hour. Could biodigesters turn into the brand new artisanal cheese?

Multiple advantages

There are a variety of causes to like biodigesters. Dairy farmers can diversify their earnings whereas defending the setting. Because they run on cow manure, that waste stays out of lakes. This reduces phosphorus air pollution in native waterways, creating fewer algal blooms. Biodigesters additionally seize methane, a potent greenhouse fuel that will in any other case escape into the environment. 

A tall biodigester at Jordan Dairy Farm in Spencer, Massachusetts.

Not solely do biodigesters yield marketable vitality, however their by-products save farm prices on provides corresponding to fertilizer, bedding and compost. Farmers utilizing fertilizer produced by these methods report increased crop yields—and decreased odor in contrast with spreading manure on the fields. And given the skyrocketing price of fertilizer, it’s a bonus to generate it on-site. 

According to the EPA, in 2021, biodigesters nationwide averted 5.95 million megatons of carbon dioxide equal. That’s like eradicating 1,282,042 gasoline-powered passenger automobiles from the roads for a 12 months. Those biodigesters generated 1.73 million megawatt-hours, sufficient to energy 86,500 homes. 

The dimension drawback

The extra cows that ship manure right into a biodigester, the extra vitality it produces. But cow manure is just not an environment friendly gas. Before the biodigester ekes out the remaining vitality, manure has been digested—twice—by the cow. Less vitality means much less earnings. That means it takes about 5,000 cows feeding a manure-only biodigester to repay the tools shortly, says John Hanselman of Vanguard Renewables. That’s not a sustainable mannequin for small farms.

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Vanguard says it has an answer: Collect meals waste, which might in any other case sit in landfills producing methane, and add it to manure biodigesters. Nearly a 3rd of the world’s meals is wasted, and it generates about six p.c of worldwide greenhouse fuel emissions when it rots. But correctly harnessed, meals waste generates 4 to 5 instances extra vitality than cow manure, giving biodigesters the punch they should generate these kilowatt-hours. 

“We’ve been in a position to crack the code on easy methods to do digesters on small dairy farms,” says Hanselman. 

Outsourced administration

Running a biodigester is just not as simple because it sounds, particularly when incorporating that all-important meals waste. The logistics of accumulating meals waste, eradicating plastic packaging and transporting it to farms are complicated and costly—not a DIY second. Fortunately, farmers can outsource these logistics. 

Some firms, like Vanguard, supply turn-key biodigester administration, from allowing by way of vitality manufacturing. Vanguard foots the invoice to keep up and function the biodigester, collects the vitality income and pays lease to the host farm. The farm retains the fertilizer, bedding and different by-products of the biodigester. Similar turn-key firms function in states together with Washington, Wisconsin and Missouri.

Denise Barstow Manz of Barstow’s Longview Farm.

Denise Barstow Manz, of Barstow’s Longview Farm in Hadley, Massachusetts, is a seventh-generation farmer on the household’s 450 acres. The medium-sized dairy, milking greater than 500 cows, generates about 85 p.c of its income from standard milk gross sales. Longview companions with Vanguard to handle its biodigester, and Manz says she’d do it once more. “The magnificence is that we will concentrate on farming and doing what we do nicely. And they’ll concentrate on working the digester from upkeep to chemistry to the waste contracts,” she says.

Manz is aware of colleagues working biodigesters solo. “There’s positively farms on the market doing their very own operation. And I do know generally if it’s corn harvest season or if they’ve one thing happening within the barn and the digester is down, it stays down longer,” she says. “That’s not supreme.” 

Adoption and abandonment

The biodigester earnings stream is nicely established in Vermont. The Vermont Cow Power program, launched in 2004, was among the many first within the nation. Cow Power now gives renewable electrical energy for greater than 3,000 houses and companies, together with a ski resort and a brewery. And demand is rising. In 2021, the selectboard of Brattleboro, Vermont voted to buy six p.c of the city’s electrical energy by way of Cow Power. Most of the Cow Power farms in Vermont are working their very own methods, with the notable exception of Goodrich Farm, a 900-cow dairy whose biodigester is powering Middlebury College. 

Vermont has 16 energetic dairy biodigesters, greater than 30 different states—spectacular for its dimension. About half of Vermont’s digesters incorporate meals waste to spice up productiveness. Notably, nonetheless, seven Vermont biodigesters ceased operation over the previous 10 years. Most of those cited a defective mixing design or issues acquiring meals waste. But, for some, the problem was upkeep prices. 

RELATED: Can the Northeast’s Organic Dairy Farms Be Saved?

“A number of the early Cow Power methods are ageing out now,” explains Hanselman. Around 12 months 10, most biodigesters want a brand new transformer. “That’s a terrifying factor,” he says. “What farmer has $600,000 mendacity round for brand new electrical infrastructure?”  

While different states have been gradual to observe Vermont’s early begin, California’s latest biodigester progress is sort of a new gold rush. California has 52 methods, main the nation. The state handed a invoice in 2018 requiring that 60 p.c of its vitality come from renewable sources by the 12 months 2030—and it underwrote that mandate with monetary help. California’s renewable vitality coverage even gives a marketplace for dairy biodigesters in different states, which promote their vitality output to California. 

Is the biodigester motion a cow-pie-in-the-sky dream? Even with out counting set up, it’s clear that subsidies are wanted to reap the advantages of biodigesters. This isn’t a surprise; applied sciences that scale back the carbon footprint of any business carry a price ticket, as do farm subsidies typically. 

Like a number of different states, Vermont pays farmers a consumer-supported bonus above and past the market price for electrical energy. Vermont’s utility clients decide into the Cow Power program by agreeing to pay an additional 4 cents per kilowatt-hour. Four cents appears to be the candy spot. Much increased than that and customers received’t pay. For instance, Maine gives farmers 10 cents per kilowatt-hour; Maine has just one biodigester. Any decrease than 4 cents and farmers can’t repay their tools prices in an inexpensive time.  

Reflecting values

Longview Farm’s biodigester has linked the area people with the Barstow household’s values. “Climate change will affect each single one in every of us, and it’s actually going to affect dairy farming. It already has; we’ve seen wetter seasons, we’ve got hotter cows. If we will scale back our carbon footprint, it helps get us to carbon zero as a group and helps indirectly to mitigate local weather change. I believe that’s actually essential. And I believe we’re in a group that resonates with that,” says Manz. 

“The undeniable fact that we will take higher care of our land with this digester is a win for us and the complete space.”

And there’s stewardship worth in farm survival. “Keeping these 450 acres of land open is nice for property values, but it surely’s additionally good for groundwater, wildlife habitat, meals safety and local weather resilience. If we lose dairy farmers, we don’t solely lose that farm and that a part of the meals system. So, the truth that we will take higher care of our land with this digester is a win for us and the complete space,” says Manz. 

The EPA most not too long ago counted 265 dairies throughout 35 states working biodigesters. Most of these farms are a lot bigger than New England’s dairies, so, even with gradual progress, there are greater than 873,000 dairy cows nationwide producing renewable vitality. 

Generating vitality is significantly extra difficult than making cheese. But for a lot of small household dairy farms, it’s a confirmed ingredient of their sustainability. 

Those involved in making use of for funding help to construct a biodigester ought to contact their state’s USDA workplace or state rural growth vitality co-ordinator




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