Ethanol plants use hops to eliminate bacteriaSeptember 20, 2009 - 12:00ambusiness/energy-and-mining
LUCAN, Minn. -- Ethanol companies are looking back to the monasteries of ancient Europe for one possible solution to a troublesome production issue.
They have to control bacteria to make good ethanol. The most common weapon, antibiotics, works well enough, but it's becoming a public relations headache.
Earlier this year, the Food and Drug Administration said it was finding antibiotic residue in an ethanol byproduct. That byproduct is...