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One change has been adapting technology used to freeze hockey rinks to minimize the smell.
The company has made the changes after the Moorhead area was hit with a skunk-like smell for several days in May 2007.
American Crystal has covered its last-to-be-processed outdoor beet pile with a freezing mat and replaced straw on the wastewater pond with a cover that better holds in odors.
The Minnesota Pollution Control Agency has said spoiling beets and heavy winds that blew straw off a wastewater storage pond contributed to the stench last year.
Factory officials say the company isn’t making any promises, but the actions so far are working.
