This new invention was developed after preliminary studies were done producing DDGS granules using a lab-scale rotary drum dryer. Recently, extensive studies have been conducted at the labscale to understand the kinetics of granule growth. DDGS granules manufactured in a granulating drum are spherical pellets with improved handling properties and increased bulk density compared with DDGS produced using the traditional blending and rotary drum drying process common in dry-grind ethanol processing.
Granulation: A novel method to improve the bulk density and flowability of distillers grains with solubles By Dr. Klein Ileleji Despite the challenges of handling, advancements are being made in the quality characterization and monitoring of this essential byproduct. T he growth in fuel ethanol production has dramatically increased the production of dis- overseas market, which commands a large supply of DDGS, is impor- tant. The export market makes tillers dried grains with solubles long-distance DDGS transport to (DDGS), a granular bulk product export markets important to the In the News obtained from the nonfermentable ethanol industry — especially as residues of corn during ethanol ethanol production increases to Osabe Bio Energy signs contract bioprocessing using the dry grind meet the Renewable Fuels Standard with Land O’ Lakes Purina production process. For every II (RFS2) mandate (15 billion gal- Osage Bio Energy has signed a con- bushel of corn converted into eth- lons/year of corn ethanol). tract with Land O’Lakes Purina Feed to anol — a third which constitutes market its barley protein meal (BPM), a the unfermentables — is dried and Problems in DDGS transport coproduct of its ethanol bio-processing sold as DDGS. Since DDGS is Flowability of DDGS has been operation. Osage Bio Energy’s first plant, Appomattox Bio Energy, located in primarily used as a feed ingredient cited as one of the major hurdles Hopewell, VA, is the first commercial scale for livestock diet rations (beef and to expanding existing markets barley-to-ethanol processing plant in the diary cattle, swine and poultry), and developing new markets for United States. most plants are set up to produce DDGS. Two Class A carriers that A coproduct derived from processing the dried coproducts. Once cre- were allowing DDGS transport barley into ethanol, BPM is a new protein- ated, they are shipped via truck or in their cars no longer accept rich animal feed ingredient. The innovative rail for use by distant customers. DDGS; and exporters in the process design of Osage Bio Energy’s plant In the United States limits have Pacific Northwest refuse to handle includes a specialized milling technique that been placed on
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