cows and fuel cells

clipped from www.sciencedaily.com Cows might be alternative energy sources COLUMBUS, Ohio, Aug. 23 (UPI) -- U.S. scientists say cows might one day help meet the rise in demand for alternative energy sources. Ohio State University researchers used microbe-rich fluid from cows to generate electricity in a new, small cellulose-based microbial fuel cell. Doctoral student Hamid Rismani-Yazdi, lead author of the study, said experiments showed it took two of the new cells to produce enough electricity to recharge an AA-sized battery. That power was produced from the breakdown of cellulose by a variety of bacteria in rumen fluid -- the microbe-rich fluid found in a cow's rumen, the largest chamber of a cow's stomach. To create power, researchers fill a microbial fuel cell with cellulose and rumen fluid. "Energy is produced as the bacteria break down cellulose, which is one of the most abundant resources on our planet," said Rismani-Yazdi.