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Features & Benefits
- Great source
of Rumen By-Pass Protein for dairy and beef cattle.
- High Energy,
due to the fat composition and oil content from corn.
- Excellent
Source of essential minerals potassium and phosphorus.
- Greater
availability of phosphorus in swine rations.
- Enhance
palatability of the ration, stimulating dry matter intake with
ruminants.
- Excellent
source of linoleic acid, methionine, cystine and vitamin E.
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Nearly
3.8 million tons of distillers dry grains are currently created
in domestic dry grind ethanol production; farmer owned cooperatives
represent 48% of that production. For every bushel of corn made
into ethanol, 18 pounds of DDGS are created and must maintain
value to contribute to plant profitability. With the capacity
for ethanol production set to double by 2003 assuming that dry
grind production doubles as well, the potential supply of DDGS
is almost 7 million tons.
The
corn kernel is mostly starch at 61% of the wet weight, with protein,
fiber, corn oil and water making up the remaining 39%. The dry
grind ethanol process uses most of the starch present in the corn
kernel during fermentation, leaving protein, fiber, fat, minerals
and vitamins behind. The three groups of ethanol by-products are
Corn Distillers Dried Grains (DDG), Corn Distillers Dried Grains
with Solubles (DDGS), and Corn Condensed Distillers Solubles (CDS).
Distillers grains may also be sold wet in some situations.
Dry
grind ethanol production begins by grinding corn into a coarse
flour and combining with water and enzymes. The enzymes begin
the conversion process of starch to sugar creating a mash that
is then cooked and sterilized. After cooling, yeast is mixed with
the mash to ferment the sugars into ethanol, carbon dioxide and
other metabolites. The fermented mash is then sent to distillation
to extract the ethanol. The mash is now considered spent mash
which then goes onto either a screen press or centrifuge, where
as much liquid as possible is separated.
The
liquid that is separated either goes back into the cooking system
and is sold as livestock feed, or is partially dehydrated into
syrup called condensed distillers solubles (CDS). The spent grains
can also be sold as livestock feed as wet distillers grains or
dried, in which case they are called distillers dried grains (DDG).
If the syrup is added to the wet distillers grains and then dried,
the resulting product is referred to as distillers dried grains
with solubles (DDGS).
RELATED
LINKS:
University
of Minnesota DDGS Research Page
http://www.ddgs.umn.edu
Distillers
Grains Technology Council
www.distillersgrains.org
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