Waste water treatment
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United States of America Patent
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-
May 17, 1988
Issued Date -
N/A
app pub date -
Apr 2, 1987
filing date -
Apr 11, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for facilitating the separation of fat from a waste stream composition comprising water, fat, fatty acids and solids produced in food processing plants and animal rendering plants. In one embodiment, an alkaline pH control composition and an aluminum salt flocculant composition are added to the waste stream composition for subsequent separation in a clarifier of the waste stream composition into an essentially fatty layer, an essentially water layer, and an essentially solids layer. In a second embodiment, a conventional dissolved air flotation system is employed. An acidified aluminum salt flocculant composition is added to the waste stream composition prior to dissolved air introduction. The resulting waste stream composition subsequently separates in a clarifier into the three layers described above.
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