Hydraulic and earth engineering – Soil remediation – In situ contaminant removal or stabilization
Patent
1992-01-03
1994-09-06
Corbin, David H.
Hydraulic and earth engineering
Soil remediation
In situ contaminant removal or stabilization
134 10, 134 251, 134109, 210767, 405303, B09B 300, B08B 704
Patent
active
053442555
ABSTRACT:
Oil, water and sand are separated from soil by screening and separation of coarse particles, agitating the soil in a solution of non-ionic biodegradable detergent to promote emulsification of the oil, separating sand from the emulsion, separating the oil in the emulsion from the detergent solution in a coalescing filter, and recycling the detergent solution. Preferably the soil and detergent solution is agitated first at low speed to separate any aggregate from the soil, and to provide a homogenized mixture of the soil and the detergent solution, and then agitating the homogenized mixture of the soil and the detergent at high speed to transfer the oil from the soil into an emulsion with the detergent solution. For reduced maintenance of the coalescing filter, the emulsion is passed through a hydrocyclone for removing fines before the emulsion is passed to the coalescing filter. In a preferred arrangement having one additional washing stage, the sand removed from the settling tank is fed along with fines from the hydrocyclone to the additional washing stage, where the sand is washed with secondary stage wash liquid. The sand is removed from the wash liquid, and the wash liquid is fed to a flocculation tank, where contaminated fines settle and are removed from the wash liquid. The secondary stage wash liquid is recycled from the flocculation tank.
REFERENCES:
patent: 807971 (1905-12-01), Skinner, Jr.
patent: 1580723 (1926-04-01), Hapgood
patent: 1841863 (1932-01-01), Rijswijk
patent: 2009559 (1935-07-01), Mieder
patent: 2903407 (1959-09-01), Fischer et al.
patent: 2973312 (1961-02-01), Logan
patent: 3030118 (1962-04-01), Groce
patent: 3041267 (1962-06-01), Frame et al.
patent: 3084943 (1963-04-01), Weis
patent: 3088744 (1963-05-01), Ezekiel et al.
patent: 3089423 (1963-05-01), Raub et al.
patent: 3115347 (1963-12-01), Lennon
patent: 3163929 (1965-01-01), Goodstein
patent: 3172671 (1965-03-01), Downs
patent: 3226202 (1965-12-01), Nagelvoort
patent: 3471157 (1969-10-01), Swearingen
patent: 3544369 (1970-12-01), Keogh, Jr.
patent: 3639172 (1972-02-01), Keogh, Jr.
patent: 3734776 (1973-05-01), Keogh, Jr.
patent: 3802916 (1974-04-01), Jackson
patent: 3846173 (1974-11-01), Ihrig
patent: 4063743 (1977-12-01), Petros
patent: 4120775 (1978-10-01), Murray et al.
patent: 4136886 (1979-01-01), Sjoholm et al.
patent: 4239422 (1980-12-01), Clancey
patent: 4300772 (1981-11-01), Nissel
patent: 4311561 (1982-01-01), Hastings
patent: 4324652 (1982-04-01), Hack
patent: 4416764 (1983-11-01), Gikis et al.
patent: 4424081 (1984-01-01), Giguere
patent: 4501430 (1985-02-01), Kuhl et al.
patent: 4501671 (1985-02-01), Bazell
patent: 4502693 (1985-03-01), Lesiecki et al.
patent: 4606774 (1986-08-01), Morris
patent: 4802978 (1989-02-01), Schmit et al.
patent: 4865333 (1989-09-01), Winslow
patent: 4969775 (1990-11-01), Cappel et al.
patent: 4984811 (1991-01-01), Kuwabara et al.
patent: 4993873 (1991-02-01), Tippmer
patent: 5098224 (1992-03-01), Netzel et al.
EPA Handbook, Remediation of Contaminated Sediments, EPA 1625/6-91/028, U.S. Environmental Protection Agency, Washington, D.C. (Apr. 1991).
EPA Contaminated Sediments Seminar Speaker Slide Copies, CERI-91-19, U.S. Environmental Protection Agency, Washington, D.C. (May 1991).
Brochure, ACS Industries, Inc., Houston, Tex. (1991), 4 pg.
Inplant SFC Brochure, Gulf Coast B10 Solve, Houston, Tex. (1991), 2 pg.
Solids From Liquids Filtration with LAKOS Separators, Claude Laval Corporation (1991), 1 page.
Heinis, et al., "Bodemsaneringstechnieken/1 Verwijdering van bodemverontreiniging," PT/Civiele Techniek, vol. 39, No. 1, Jan. 1984, pp. 7-15.
Van Gemert et al., "Reinigingsinstallatie voor vervuilde grond Extractie van broomverbindingen," PT/Civiele Techniek, vol. 40, No. 9, Sep. 1985, pp. 24-29.
Corbin David H.
Itex Enterprises, Inc.
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