Waste water treatment

Details Waste water treatment Waste water treatment

1987-04-02

1988-05-17

Hruskoci, Peter

Liquid purification or separation

Processes

Treating by enzyme

210705, 210708, 210725, 210727, 210905, 2604125, 260414, C02F 154

Patent

active

047449039

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.

REFERENCES:
patent: 2204703 (1936-11-01), Sanders et al.
patent: 2708630 (1955-05-01), Davis
patent: 3676334 (1972-07-01), Zuckerman et al.
patent: 3707464 (1971-07-01), Burns et al.
patent: 3951795 (1976-04-01), Doncer et al.
patent: 4001114 (1977-01-01), Joseph et al.
patent: 4061568 (1977-12-01), Hall
patent: 4340487 (1982-07-01), Lyon
patent: 4436624 (1984-03-01), Kreuzburg et al.

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