Method of treating waste water

Details Method of treating waste water Method of treating waste water

1994-12-21

1995-10-17

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210259, 210805, 210806, B01D 1100

Patent

active

054587808

ABSTRACT:
The waste stream is mixed with a solvent that absorbs the oily material without dissolving in the water phase. The remaining water/solids mixture is then separated by vibratory screening, and the solids are again contacted with solvent to remove the bulk of the remaining oily material. The remaining mostly solid material is screened again and then dried to remove any remaining solvent. The solvent is processed to remove the dissolved oily material, which is then sold or discarded. The water from the screening and drying steps is processed to remove any solvent entrained with the water, and the resulting solvent, solids and oil-free water is discharged.

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patent: 4728428 (1988-03-01), Broussard
patent: 4790943 (1988-12-01), Dunne et al.
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patent: 5167829 (1992-12-01), Diamond et al.
patent: 5173190 (1992-12-01), Picek
patent: 5186817 (1993-02-01), Paspek et al.
patent: 5207921 (1993-05-01), Vincent
patent: 5269939 (1993-12-01), Laurent et al.
patent: 5286386 (1994-02-01), Darian et al.

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