Deodorization of sewage sludge-derived oils
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United States of America Patent
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Jul 6, 1993
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N/A
app pub date -
Dec 13, 1991
filing date -
Dec 13, 1991
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Abstract
A method is provided for treating a sewage sludge-derived oil having a particular chemical composition, to reduce its odor. The method includes the first step of distilling the sewage sludge-derived oil to 150.degree. C. to remove water and volatile organic components, and then the essential step of circulating a gas consisting essentially of carbon dioxide gas therethrough.
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