Over the last two years, Rob Van Vleet has been slowly scrapping the last vestiges of Kimball, Nebraska?s first wind farm. The wind turbines are made to be sturdy, he said, but they don?t last forever ? about 20 years.
While most of a turbine can be recycled or find a second life on another wind farm, researchers estimate the U.S. will have more than 720,000 tons of blade material to dispose of over the next 20 years, a figure that doesn?t include newer, taller, higher-capacity versions.
There aren?t many options to recycle or trash blades, and what options there are is expensive, partly because the U.S. wind industry is so young. It?s a waste problem that runs counter to what the industry is held up to be: a perfect solution for environmentalists looking to combat climate change, an attractive investment for companies like Budweiser and Hormel Foods and a job creator across the Midwest and Great Plains.
At the end of a long gravel road on the southwest Nebraska prairie, the Kimball Wind Project is caught in the breeze. But the turbine scrap scrap area looks more like a sci-fi drama set. Van Vleet climbed atop a 127-foot-long turbine blade, and walked the length like a plank.
?These towers may be supporting as much as 150,000 pounds, 250 feet in the air,? Van Vleet said. ?The stands are an inch and a half thick steel … so they?re very strong.?
Van Vleet said 90 percent of a turbine?s parts can be recycled or sold. But the blades, made of a tough but pliable mix of resin and fiberglass ? similar to what spaceship parts are made from ? are a different story.
?The blades are kind of a dud because they have no value,? he said.
Decommissioned blades are also notoriously difficult and expensive to transport. They can be anywhere from 100 to 300 feet long, and need to be cut up onsite before getting trucked away on specialized equipment ? which costs money ? to the landfill.
Once there, Van Vleet said, the size of the blades can put landfills in a tough spot.
?If you?re small utility or municipality and all of a sudden hundreds of blades start coming to your landfill, you don?t want to use up your capacity for your local municipal trash for wind turbine blades,? he said, adding that permits for more landfill space adds another layer of expenses.
Cindy Langstrom manages the turbine blade disposal project for the municipal landfill in Casper, Wyoming. Though her landfill is one of the only ones in the state ? not to mention the entire U.S. ? with enough space to take wind farm waste, she said the blades? durability initially posed a financial hurdle.
?Our crushing equipment is not big enough to crush them,? she said.
These old wind turbine hubs will be scrapped. CREDIT CHRISTINA STELLA / HARVEST PUBLIC MEDIA
Langstrom?s team eventually settled on cutting up the blades into three pieces and stuffing the two smaller sections into the third, which was cheaper than renting stronger crushing machines that are usually made for mining.
