The question of biofuels as an energy source has probably generated more heat than light. It has also powered a great many vehicle miles that otherwise would have been powered by gasoline. Whether you consider that a good thing or a bad thing will likely determine your position on the issue.
Conservatives dislike biofuels because they represent a large government program and because they pose a genuine threat to one of their biggest supporters, the oil industry. Liberals dislike them because they are the legacy of George W. Bush and because of their inherent distrust of industrial agriculture which benefits greatly from the commitments that have been made.
While these facts are all true, they are more distractions than anything to do with the crux of the matter. Clearly, the issue is complex enough to merit an entire book, but let me just focus your attention on what is happening right now.
The oil industry lobby works tirelessly to protect the hundreds of billions of dollars of profits that their sponsors receive every year. Sensing an opportunity in the public’s combination of confusion over and dislike of ethanol, they have gone on the offensive, asking the EPA to back off on the amount of ethanol mandated under the Renewable Fuel Standard (RFS). The EPA has listened and as of December, they have reduced the amount of ethanol that must be produced by 1.34 billion gallons, a reduction of roughly 8%. Further greater reductions of as much as 40% are on the table and will be decided in June.
While it’s true that there is much to dislike in the corn ethanol program, including its energy intensity, competition with food, and relatively small net energy benefit, not to mention the fact that we are now producing far more gasoline domestically via fracking and other questionable means, there is a sustainable gem at the heart of the program. That gem, known as cellulosic ethanol, uses non-food sources, such as agricultural residue, trash, wood chips and forest trimmings to make fuel. These fuels represent a far better ecological bargain than corn or any other food crop. The reason we went with corn at first was because we know how to grow lots of corn really well, and we’ve known how to make alcohol out of corn since the days of the moonshiners. The reason we didn’t start out making fuel out of wheat straw, or corn stalks or other crop wastes was because we didn’t know how. Many years and millions of research dollars later, studying everything from enzymes to embryogenic cell cultures, cellulosic ethanol is on the verge of becoming prime time. This could turn out to be a really bad time for the government to withdraw its support. Doing so now could be like throwing out the baby with the bath water.
Abengoa Bioenergy, a Spanish company, is investing $500 million in a plant in Kansas that will produce 25 million gallons of ethanol per year from crop wastes. The plant, which will be operational next month, will be powered by a 21 MW electric generator that will also be powered from biomass. That plant will be followed later in the summer by a plant of similar size in Emmetsburg, Iowa by the South Dakota-based ethanol producer Poet, in partnership with the Dutch company Royal DSM. Those two plants will be followed by a 30 million gallon plant DuPont that is underway in Nevada, Iowa, that will also be using corn waste.