The collaborative, with membership representing universities, researchers,
technology pioneers and environmentalists, is investigating pelletized
grass as a fuel with benefits for land stewardship, economic development,
a healthy environment and energy independence. At a time when energy
concerns are a hot topic, even making it to President Bush's State of the
Union speech last week, the prospect of an energy source that is
affordable, sustainable and secure has captured the imagination of
potential users, as well as farmers who see it as a possible new profit
source for their farms.
Proponents of grass pellets as fuel describe a process where farmers would
cut grass late in the season, typically from land that had been left
fallow or was planted as a buffer strip to prevent pesticide and silt
runoffs into streams, bale it and put it through a pelletizer to produce
half-inch diameter pellets. The pellets can be burned in commercial
heating systems, such as the ChipTec gasifier that is in use at the Farm
Barn.
Present for the inaugural burn were the founders of the Grass Energy
Collaborative (GEC), President Jock Gill of Medford, Mass., and Peacham,
Vt.; Jerry Cherney, a professor of agriculture at Cornell University who
has been researching grass biomass for more than 20 years; Averill Cook
who installed two pellet heating systems that have been using wood pellets
on the Farm in the last year; and GEC Treasurer Marshall Webb of Shelburne
Farms. Professor Cherney donated the pellets, made in Canada from grass
harvested from land owned by Cornell University, for the burn.
Gill began looking into alternative energy sources after he and his family
made plans to move to a historic house in Peacham and found that, as it
had no insulation, it was going to be prohibitively expensive to heat.
Lucky coincidence brought him into contact with heating system
entrepreneur Cook, grass energy researcher Cherney and Webb, special
projects coordinator at Shelburne Farms and a long-time champion of
ecological causes. Shelburne Farms is a 1,400-acre working farm, national
historic landmark and nonprofit environmental education organization whose
mission is to cultivate a conservation ethic by teaching and demonstrating
the stewardship of natural and agricultural resources.
The Grass Energy Collaborative was incorporated in Vermont as a nonprofit
in December of 2005. Its purpose is to demonstrate the viability of grass
as a renewable energy source and to promote grassland stewardship for a
healthy environment, economic development and energy independence.
Webb said that Shelburne Farms is committed to switching to renewable
sources of energy, and producing as much of that energy as possible on the
farm. Grass energy, he said, could conceivably replace the 20,000 gallons
of propane and 24,000 gallons of fuel oil currently used annually for
heating, as well as a significant portion of approximately 675,000
kilowatt hours (kWh) of electricity.
During late summer of this year, The Grass Energy Collaborative will
harvest approximately 300 acres of grass on Shelburne Farms and land
nearby, press it into 1/2-inch diameter pellets, and store these pellets
in silos owned by Meach Cove Trust in Shelburne. The grass pellet fuel
will be burned in a few commercial heating systems, one of which will be
the ChipTec gasifier located in the Farm Barn.
Next heating season, Shelburne Farms hopes to heat the Farm Barn entirely
on pellets made from grass harvested on the farm. All the participants
stressed that the technology is in its development stage and that Friday's
burn was designed to show if modifications were needed to the Farm Barn
furnace to efficiently burn this fuel. More extensive two-day tests are
scheduled. Members of the collaborative are also hoping to raise funds to
develop a portable pelletizer that could be moved from farm to farm.
The Grass Energy Collaborative has touted its pelletized grass fuel as an
answer to several problems, including the $600,000 per minute being spent
on foreign fossil carbon energy, the need for strategies that will mean
long-term economic viability for the 350,000 mid-sized farmers in the U.S.
who work 40 percent of agricultural land and are at risk; the non-point
source pollution of streams and lakes from sediment, fertilizers and
pesticides; the risk inherent in control of the fossil fuel supplies by
sometimes unstable foreign governments; the inefficiency of centralized
power plants; and the negative net energy return on some current fuels,
such as gasoline.