Why cannot grass clippings be used for ethanol look at the energy cows get from grass.. Maybe studing how cows convert grass plus current ethanol processes could make use of the huge waste of a residential resource. in grass clippings and the grass on the side of roads and highways too.. Gather it ALL for ethanol production..
"Our preliminary cost estimates suggest that we can produce biobutanol from corn for about $1.20 per gallon, not including a credit for the hydrogen produced. This compares with ethanol production costs of about $1.28 per gallon. Taking into account the higher Btu content of butanol, this translates to 105,000 Btu per dollar for butanol and 84,000 Btu per dollar for ethanol with corn at $2.50 per bushel. As a further point of reference, butanol produced from petroleum costs about $1.35 per gallon to manufacture.
The economics of the EEI process will be even more attractive when waste material is used as feedstock instead of corn and the price to produce a gallon is $0.85 . In such cases the need and cost to grow and prepare the corn for fermentation, by far among the major cost items, are eliminated."