Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Patent
1982-09-30
1984-08-07
Hruskoci, Peter
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
210196, 210199, 210202, 210206, 210220, 210415, C02F 1114
Patent
active
044642571
ABSTRACT:
According to an embodiment thereof, the apparatus comprises a pair of reaction vessels in which, 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 carried out in the apparatus, 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.
patent: 3997437 (1976-12-01), Prince et al.
patent: 4214887 (1980-07-01), van Gelder
patent: 4340473 (1982-07-01), Lindman et al.
patent: 4377486 (1983-03-01), Barrick et al.
Borg Sidney
Bozzone, Sr. Richard T.
Cardenas Raul
Cunningham Seamus
Lynch Joseph M.
Hruskoci Peter
Process Research Development & Management, Inc.
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