Process for the oily sludge of food byproducts
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United States of America Patent
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Issued Date -
Jan 26, 2006
app pub date -
Jul 21, 2004
filing date -
Jul 21, 2004
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Abstract
A novel processing method of producing non-oily dissolved air flotation (DAF) sludge or vegetable soap stock sludge product is provided. The oily sludge from a dissolved air flotation unit in a food waste water treatment plant or from vegetable soap stock in a vegetable oil processing plant is converted into non-oily property by alkali and water absorbent to form fatty acid salts. The non-oily product is dried by a normal dryer. The issues of pollution, waste water, and processing cost for DAF sludge are resolved or reduced by this practical and economical processing method. Also the product properties are improved. The method could save millions of dollars for food and feed industries.
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