Liquid purification or separation – Processes – Treatment by living organism
Patent
1984-08-06
1985-02-19
Hruskoci, Peter
Liquid purification or separation
Processes
Treatment by living organism
210622, 210623, 210629, 210631, 210752, 210760, 210806, C02F 1102
Patent
active
045004285
ABSTRACT:
According to an embodiment thereof, the method comprises using a pair of reaction vessels, sequentially, to treat the sludge. Both vessels are pressurized, and the first thereof has an aerator for aerating the sludge, and receives sulfuric acid and chlorine thereinto through a port. A dewatering device is provided upstream of the first vessel, and the outlet of the first vessel is coupled to an inlet of the second vessel through another dewatering device. The second vessel defines a final-treatment chamber in which the sludge is exposed to ozone, air and lime. The treatment method, then, comprises the steps namely: introducing the sludge into the first vessel and oxidizing and depressing the pH of the sludge so introduced, and recycling the sludge in the first vessel over a given period of time. Thereafter the sludge is dewatered and conducted to the second vessel wherein it is exposed to air, ozone and lime, as aforesaid, and discharged after a like period of time. The solid and liquid constituents are separated from the discharged sludge, and the latter is returned to the first vessel.
REFERENCES:
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patent: 3695173 (1972-10-01), Cox
patent: 3966607 (1976-06-01), Gaynor et al.
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patent: 4214887 (1980-07-01), Van Gelder
patent: 4340473 (1982-07-01), Lindman et al.
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Borg Sidney
Bozzone, Sr. Richard T.
Cardenas Raul
Cunningham Seamus
Lynch Joseph M.
Hruskoci Peter
Process Research Development & Management, Inc.
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