Process for treatment of sewage sludge

Details Process for treatment of sewage sludge Process for treatment of sewage sludge

1996-06-11

1997-04-08

Hruskoci, Peter A.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210751, 210764, 210770, 588252, 588256, C02F 1114

Patent

active

056184425

ABSTRACT:
A process and apparatus for treating sewage sludge having the steps of providing sludge at a desired rate, mixing the sludge with at least one alkaline additive at a proportionate rate to the sludge to raise the pH of the mixture to at least a desired level, providing a pasteurization chamber having a means to heat the contents of the chamber, continuously delivering the sludge and alkaline additive mixture to the inlet opening of the pasteurization chamber, heating the pasteurization chamber to maintain a minimum temperature of the sludge and alkaline additive mixture in the pasteurization chamber, continuously conveying the sludge and alkaline additive mixture without any substantial agitation of the mixture for a desired duration through the pasteurization chamber such that the thixotropic mixture does not become watery, and continuously discharging the sludge and alkaline additive mixture from the discharge opening of the pasteurization chamber, whereby harmful pathogens are destroyed in the sludge.

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