500 farmers recruited for giant US biofuel plant by Tina Casey

CleanTechnica

DuPont is building one of the world’s largest cellulosic biofuel plants in Nevada, Iowa; and it’s going to take a lot of corn stover to keep this baby humming, to the tune of 30 million gallons of ethanol per year. Corn stover is the leaves, stems, and anything else left over from harvesting the edible part of the corn harvest. The facility won’t be up and running until mid-2014, but DuPont is already looking ahead to contracting with more than 500 farmers to keep the stover coming. Aside from providing some extra income, the project could also help local farmers resolve some sticky crop management issues.

Corn Stover Means More than Biofuel

As a next-generation biofuel feedstock, corn stover fills multiple roles. First and foremost it piggybacks on a food crop, so at least theoretically it crowds out zero acres of land for human or animal feed.

Secondly, the use of corn stover as a feedstock can help farmers achieve more efficient crop management.

According to DuPont, corn stover is a “major challenge” for many corn farmers, because it can harbor pests, contribute to nitrogen depletion, and interfere with the next planting.

Generally, leaving some residue after harvest is good for soil preservation, but too much of a good thing can be a headache.

The new facility will collect about 375,000 dry tons of stover annually, from about 190,000 acres in a radius of 30 miles from Nevada (Nevada, Iowa that is).

Taking Iowa Biofuel to the Next Level

Cellulosic biofuel is the dream that biofuel researchers have been chasing for a generation. In breadbasket states like Iowa, it means a second life for harvest leftovers. In other states, you could see marginal lands planted with perennial biofuel crops likeshrub willow and poplar trees.

The challenge is to find a cost-effective way of breaking down the tough cell walls to get at the sugary goodness inside.