The Minnesota ethanol industry is evolving even in the face of growth challenges including continued uncertainty around the Renewable Fuel Standard (RFS). Since 2007 the industry has improved by leaps and bounds in terms of technological advancements, energy efficiency and sustainability.
“Minnesota ethanol producers are continually evolving with respect to the use of technology and processes to decrease the inputs of energy and water while increasing their output of ethanol and co-products such as DDGs and corn oil,” explains Tim Rudnicki, executive director of the Minnesota Bio-Fuels Association.
According to a 2011 report from the Argonne National Laboratory, ethanol producers have cut water use in half within a 10-year period. In fact, Rudnicki notes that some producers are using less than two gallons of water to produce 1 gallon of ethanol. When comparing water use with the production of oil, depending on where the oil is extracted, oil production can require more than seven times that much water to produce one gallon of gas. Other ways ethanol producers are infusing sustainability within water use is by using storm water and treated municipal wastewater.
Specifically, the Al-Corn Clean Fuel ethanol plant has completely eliminated any process water discharge. Randall Doyal CEO of the Claremont, Minnesota-based plant says, “This cut our water consumption down to just over two gallons per gallon of ethanol. The water that is used is for cooling and is evaporated, so it returns to the atmosphere to recycle back as rain. We continually recover water in the process to reuse again and again.”Read More