Wisconsin got smart about road salting.. they saved on rock salt by using cheese brine

Brine is a liquid cheese-making byproduct; if you’ve bought fresh mozzarella, it often comes floating in the stuff. To cheese-makers, it’s a hassle — they spend many thousands of dollars to dispose of cheese brine each year, trucking it to wastewater treatment plants.

Cheese brine hit the highway. And in the first year alone, tiny Polk County saved $40,000 in rock salt costs. Conversely, F&A Dairy saved on brine disposal costs — to the tune of nearly $30,000. “Everybody wins,” says Chuck Engdahl, F&A’s wastewater manager.

Found on http://tywkiwdbi.blogspot.com/2013/12/cheese-brine-for-icy-roads.html