Also remember that in addition to the moisture content of the various feedstocks, some of those (wheat, corn, other cereal grains) are not DIRECTLY fermented. These are high starch materials that must first be broken down to simple sugars (via sprouting - like they do with malting barley prior to brewing OR with added enzymes). The point is (sorry) that stocks with ample sugar like cane or beets do not require this step and may be cheaper/more cost efficient when producing ETOH. Just a thought.
Ciao, Geoff > DAVID REID wrote: > > People and Sam, > A point that everyone might have missed from the > table below that Sam posted earlier is that while this table shows the yield > per ton it is based on the natural air weight of the product listed ie it > includes water eg. wheat and corn both have approx water contents around 12% > on average (and close on 75% carbohydrate levels) whereas potatoes and sugar > have water contents quite often up in the high 80s %wise (and carbohydrate > levels of 90% when the water is removed). This is a point that always has to > be remembered when dealing with any plant product and calculating the > conversion efficiency. If you leave the ethanol manufacturer out of it what > it comes down to is the yield per acre as far as the grower goes and if you > leave the grower out the yield per ton as far as the etahnol manufacturer > goes. It really depends on which side of the fence you stand. > B.r., David > > > > Probable yeild from a ton of raw material based on the average > fermentable sugar content(1): > > Material Gallons/Ton > > Wheat---all varieties 85.0 > Corn 84.0 > Buchwheat (OTAY PANKEE) 83.4 > Raisins 81.4 > Grain Sorghum 79.5 > Rice, rough 79.5 > Barley 79.2 > Dates, dry 79.0 > Rye 78.8 > Prunes, dry 72.0 > Molasses, blackstrap 70.4 > Sorghum Cane 70.4 > Oats 63.6 > Cellulose (approx.) 62.0 > Figs, dry 59.0 > Sweet Potatoes 34.2 > Yams 27.3 > Potatoes 22.9 > Sugar Beets 22.1 > Figs, fresh 21.0 > Jerusalem Artichokes 20.0 > Pineapples 15.6 > Sugar Cane 15.2 > Grapes, all varieties 15.1 > Apples 14.4 > Apricots 13.6 > Pears 11.5 > Peaches 11.5 > Plums 10.9 > Carrots 9.8 > Cheese Whey--depends on sugar content > > eGroups Sponsor > [Paid Net2phone Advertisement - Click Here!] > Paid Net2phone Advertisement - Click Here! > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > To unsubscribe, send an email to: > [EMAIL PROTECTED] -------------------------- eGroups Sponsor -------------------------~-~> eGroups eLerts It's Easy. It's Fun. Best of All, it's Free! http://click.egroups.com/1/9698/0/_/837408/_/977121310/ ---------------------------------------------------------------------_-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html To unsubscribe, send an email to: [EMAIL PROTECTED]
