Activated sludge treatment

Details Activated sludge treatment Activated sludge treatment

1979-05-29

1981-03-17

Cintins, Ivars C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

210710, 210737, 210768, 210905, 210928, C02F 1114

Patent

active

042566304

ABSTRACT:
The method of treating an activated sludge to facilitate dewatering thereof comprising the steps of acidifying the sludge to a pH below about 2.2, heating the acidified sludge to a temperature of from about 150.degree. to 210.degree. F. and maintaining the sludge at said temperature for a period of time sufficient to obtain a settling rate of solids in the first three minutes of at least two-sixteenths inch per minute.

REFERENCES:
patent: 2742359 (1956-04-01), Rahn
patent: 3649534 (1972-03-01), Schotte
Wilson et al., A Practical Solution of the Problem of Dewatering Activated Sludge, Ind. & Eng. Chem., vol. 15, No. 9, (Sep. 1973), pp. 956-959.

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