Liquid purification or separation – Processes – Chemical treatment
Patent
1992-10-02
1993-06-08
Wyse, Thomas
Liquid purification or separation
Processes
Chemical treatment
210769, 210774, 210806, 44552, 48197R, C02F 1106, C10J 346
Patent
active
052176258
ABSTRACT:
A process for disposing of sanitary sewage sludge by producing a pumpable slurry of sewage sludge with or without solid carbonaceous fuel and burning said slurry as fuel in a partial oxidation gas generator, furnace, or boiler. First, an aqueous slurry of sewage sludge is concentrated to produce sewage sludge cake. The sewage sludge cake is preheated and sheared while in contact with sulfuric or sulfurous acid to produce a pumpable acidified aqueous slurry of sewage sludge having a pH of about 1 to 5. After two-stage hydrothermal treatment with neutralization of the sewage sludge after the second hydrothermal stage, the solids content of the pumpable aqueous slurry of sewage sludge is increased. By means of the subject process, the viscosity of the slurry of sewage sludge with or without solid carbonaceous fuel is reduced and coagulation is suppressed. A pumpable aqueous slurry of sewage sludge with or without solid carbonaceous fuel is produced and burned with a free-oxygen containing gas in a partial oxidation gasifier, furnace, boiler, or incinerator to produce a hot raw effluent gas stream. In a preferred embodiment, the effluent gas stream is cleaned and purified and non-contaminating ash and slag are separated. By this process, noxious sewage sludge may be disposed of without contaminating the environment. By-product synthesis gas, reducing gas, or fuel gas may be produced.
REFERENCES:
patent: 3507788 (1970-04-01), Cole et al.
patent: 3687646 (1972-08-01), Brent et al.
patent: 3803806 (1974-04-01), Komline, Sr.
patent: 4052176 (1977-10-01), Child et al.
patent: 4074981 (1978-02-01), Slater
patent: 4097378 (1978-06-01), St. Clair
patent: 4251227 (1981-02-01), Othmer
patent: 4543190 (1985-09-01), Modell
patent: 4618735 (1986-10-01), Bridle et al.
patent: 4933086 (1990-06-01), McMahon et al.
patent: 4983296 (1991-01-01), McMahon et al.
Khan Motasimur R.
McKeon Ronald J.
McMahon Matthew A.
Brent Albert
O'Loughlin James J.
Texaco Inc.
Wyse Thomas
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