Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1979-03-19
1980-11-11
Therkorn, Ernest G.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210 63Z, 210 97, 210221P, 210252, 210764, 210760, 210708, C02B 308
Patent
active
042331528
ABSTRACT:
Apparatus and method for treating liquor (e.g., liquor produced by sewage disposal systems) that is contaminated with dissolved, colloidal and finely divided suspended solids, and also with bacteria and viruses. The apparatus maintains a vertical column of the liquor in a treatment tank. Liquor is continuously introduced into the lower portion of the tank and continuously removed at a level well below the top of the tank. The column is continuously sparged with gas containing ozone whereby gas bubbles progress upwardly to the surface with formation of foam that is received in a confined space above the column. The evolving foam is delivered into the zone of operation of an impeller which collapses the foam bubbles by mechanical shearing and impacting. Liquor derived from the collapsed foam and the evolved gas is collected and discharged. Remaining uncollapsed foam is recycled into the shearing zone. Solids of the liquor are removed from the column with the foam and are discharged in the liquor collected from the foam. Also a system and method making use of a plurality of such apparatus units and which treats the liquor in successive stages.
REFERENCES:
patent: 3642617 (1972-02-01), Brink et al.
patent: 3977970 (1976-08-01), Willis et al.
patent: 4053399 (1977-10-01), Donnelly
patent: 4071447 (1978-01-01), Ramirez
patent: 4156648 (1979-05-01), Kuepper
"Ozone Disinfection of Industrial-Municipal Secondary Effluents," Nebel et al., Journal WPCF, Dec. 1973, pp. 2493-2507.
"Get Ready for Ozone," Rosen et al., Water and Waste Engineering, Jul. 1974, pp. 25-31.
"Mechanical Foam Breaker-Means for Foam Control in Wastewater Treatments," Gutierrez, Journal WPCF, Nov. 1977, 2310-2317.
"Toxicity Removed by Foam Separation," Gutierrez, Industrial Wastes, Sep./Oct. 1978, pp. 36-41.
Hill Robert C.
Kreiling Ronald L.
Nice Ralph A.
Nielson Niel E.
Atlantic Richfield Company
Therkorn Ernest G.
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