SIOUX FALLS, S.D. (AP)
SDSU researcher studying
reuse of ethanol enzymes
A South Dakota State University researcher is looking into ways to reuse enzymes, a high-cost ingredient in the making of ethanol from such nonfood feedstocks as switch grass, bluestem and corn stover.
The expensive enzymes typically float away after they do their job.
SDSU Professor Basil Dalaly is experimenting with ways to reuse the enzymes by chemically attaching them to glass beads, and then using the beads multiple times.
Enzymes can account for as much as $1 per gallon of the costs of producing cellulosic ethanol. Dalaly is hoping to cut that cost in half.
