Hard times for corn fuel Photo: Todd Ehler I've been writing for a while now about problems with distillers grains, the leftover mash from the corn-ethanol process. A third of the corn that goes into ethanol winds up as distillers grains. Finding a high-value use for this "coproduct" is absolutely vital to the corn ethanol project. The fuel's energy balance is paltry -- that is, it delivers little net energy compared to how much is consumed producing it. Even the studies that credit the fuel with a positive energy balance, like this one from the USDA, acknowledge that it's pretty …
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