MANKATO, MINN. - Where the Blue Earth River empties into the Minnesota River, a plant has been crushing farmers' soybeans since the 1930s.
One of the largest soybean oil-producing refineries in the world, the facility has been humming since California's aggressive low carbon fuel standard triggered higher demand for renewable feedstocks from diesel manufacturers.
"More gets crushed here [in Mankato] on a daily basis than anywhere in the world," said Joe Smentek, executive director of the Minnesota Soybean Growers Association. "The industry goes quietly about its business, but it's a huge economic driver for the state."
Last fall, CHS, the nation's largest farmer-owned cooperative, announced a $60 million expansion project to the Mankato refinery, which extracts oil from flattened soybeans.
Historically, most of that oil has been processed for human consumption, such as in salad dressings or cooking oils. But CHS leadership says the facility will also aim to fill in a "demand pull" from a West Coast increasingly seeking cleaner-burning diesel fuels, some made from soybean oil.
Talk of additional markets adding low carbon fuel standards — such as New York — has agriculture executives eyeing unprecedented opportunity.
"The demand pull, just for California, has created this exuberance," said John Griffith, CHS' ag business vice president, in an interview late last month. "You could consume all of the soybeans that we export to the world, just in those two markets [California and New York]."
According to the U.S. Department of Energy, only five plants nationwide produce renewable diesel, churning out 590 million gallons in 2020. But six more plants are under construction, according to DOE's Alternative Fuels Data Center. Capacity is expected to grow by 2 billion gallons.