Carbohydrate-based enzyme-containing granules for use in animal feed
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United States of America Patent
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Dec 31, 2002
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N/A
app pub date -
Jun 4, 1998
filing date -
Jun 4, 1997
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Abstract
Enzyme-containing granules for manufacturing animal feed compositions are prepared using a carrier containing at least about 15% (w/w) carbohydrate such as starch and less than 5% (w/w) protein. A mixture is formed containing an enzyme, the carrier and water, with or without prior kneading to improve plasticity, the mixture is mechanically processed such as by extrusion with a basket or dome extruder while not allowing the temperature of the mixture to rise above about 40.degree. C., and drying the resultant enzyme-containing granules. The granules may be spheronised prior to drying, and drying may be in a fluid bed agglomerator. The water and enzyme may be provided as an enzyme-containing aqueous liquid such as an enzyme-containing filtrate from a fermentation process. Enzymes include phytase, endo-xylanase and .beta.-glucanase. Other components that may be in the granules include divalent cations, cellulose, polyvinyl alcohol and an edible oil. Animal feed compositions may be prepared by mixing the granules with feed ingredients, sterilizing or treating with steam, and pelleting. The compositions show improved enzyme stability during pelleting.
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