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University of Illinois at Chicago
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The Energy Resources Center at the University of Illinois at Chicago has conducted a survey of corn ethanol technologies, ethanol and co-product yields, energy use, water use, and logistics. The survey focuses on dry mill technologies; recent industry data on wet mill plants is available from a survey conducted by the Renewable Fuels Association in 2007. The survey was administered by the Survey Research Laboratory located at the University of Illinois at Urbana-Champaign. The survey responses represent 66% of the installed dry mill ethanol capacity during the year 2008. On average, a dry-mill corn ethanol plant in 2008 utilizes 25'859 Btu/gallon (LHV, anhydrous ethanol) of thermal energy and 0.74 kWh of electricity per anhydrous gallon of ethanol; produces 2.78 gallons of anhydrous ethanol per bushel; co-produces at once 5.3 lbs of DDGS and 2.15 lbs of WDG as well as 0.006 gallons of corn oil; uses 2.72 gallons of water per anhydrous gallon of ethanol produced and discharges 0.46 gallons of water per anhydrous gallon of ethanol; sources corn for ethanol production within a 47.1 mile radius from the plant; is considering further co-product diversification and installation of efficient water use technologies.
