Guardian Energy, Minnesota's largest ethanol plant, restarted production this week as the state's battered biofuels industry has begun rebounding.
After motor-fuel demand tanked as COVID-19 stay-at-home orders took hold, ethanol production also plunged this spring to record lows. Plants throughout the country — including four in Minnesota — were temporarily idled.
Three of those plants have now reopened, while other Minnesota biofuel facilities have increased production as ethanol demand and prices have risen from their April nadir.
"It's not nearly what it was pre-COVID, but every week it is getting a little better," said Jeanne McCaherty, CEO of Guardian Energy Management.
Guardian Energy in the southern Minnesota town of Janesville is the largest of the state's 18 ethanol plants, with a production capacity of 149 million gallons per year. The plant, which employs around 50, closed April 2.
The Janesville plant gradually reopened this week and was running at 95% capacity on Thursday. "You don't just turn a key and it jumps right back up," McCaherty said.
Granite Falls Energy was idled April 3 and reopened May 18. The Denco II ethanol plant in Morris closed on March 30 and began reopening in the middle of May.
Only Gevo's facility in Luverne, the state's smallest ethanol plant, appears to remain closed. Gevo, which aside from ethanol makes isobutanol for jet fuel, was idled on March 31. The company could not be reached for comment.