Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1980-12-24
1983-03-22
Therkorn, Ernest G.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210724, 210726, 210756, 210758, 210916, 210609, C02F 152, C02F 176
Patent
active
043774865
ABSTRACT:
A process for achieving the partial dewatering of an organic sludge by isolating a batch of the sludge, acid adjusting its pH into a range from 3 to 5, and adding an oxidizing reagent in the presence of the acid in sufficient quantity so that within one-half hour the cellular structure of the sludge has been partially broken down and enough occluded water released therefrom to increase the pH by at least one, while at the same time changing the color of the sludge to a light tan and deodorizing it and killing the pathogens therein, the sludge and other solids settling down below the supernatant liquid with a clear line of demarcation therebetween.
REFERENCES:
patent: 3530067 (1970-09-01), Friedman
patent: 3772188 (1973-11-01), Edwards
patent: 3772191 (1973-11-01), Thorn
patent: 3816306 (1974-06-01), Roy
patent: 3954605 (1976-05-01), Davies
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patent: 3998714 (1976-12-01), Armstrong
patent: 4124459 (1978-11-01), Blanch et al.
patent: 4159944 (1979-07-01), Erickson
patent: 4180459 (1979-12-01), Zievers
patent: 4221661 (1980-09-01), Shimizu
Article, Journal of Environmental Engineering Division, (Dec. 1977, pp. 1013-1021) by Sukenik, King and Olver, entitled "Chlorine and Acid Conditioning of Sludge".
Barrick Paul E.
Zarur George L.
Therkorn Ernest G.
WRC Processing Company
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