While the best answer may be algae, even at the favorable yield of 5,000 gal/acre/year, millions of acres would be needed to significantly replace U.S. petroleum use." Achieving the federal objective of 21 billion gallons of second-generation biofuels made from non-grain feedstocks by 2022 is a bold objective," says Douglas Tiffany, University of Minnesota Extension energy economist. "Consider that the U.S. annual corn-based Links of London m Charm production grew by Links of London 9.3 billion gallons in the same amount of time" using well-understood commodity crop standards and fermentation technology. "Expanding second-generation biofuels is complex because it involves biomass in many varieties Links of London k Charm conditions that don't fit neat commodity grades," Tiffany says. The second generation of U.S. biofuels will not use much corn. It will depend instead on biomass such as wood waste, crop residues, municipal solid waste, algae and dedicated energy crops like switchgrass. One Florida plant will use sugarcane and Links of London L Charm; one in Louisiana will use rice hulls. Poet, the world's largest ethanol producer, plans to base 26 plants' production on corn cobs, leaves and husks. There are two kinds of next-generation biofuels, both made from cellulose. One is cellulosic ethanol, distilled from plant fibers.
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