C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/2
C02F 11/12 (2006.01)
Patent
CA 1036721
ABSTRACT OF THE DISCLOSURE This invention relates to and discloses a novel process for the treatment of organic sludge. The sludge is pre- heated in a heat exchanger by means of indirect conventional heat exchange from previously oxidized sludge and the heated sludge is then admixed with about 10 to 30 times of air which contains isolatable oxygen and steam. The sludge, which is heated to about 130°C to 150°C, is treated in a reactor under a pressure of less than 10 Kg/cm2 for more than 30 minutes and the gaseous ingredients produced in the reactor are then separated from the sludge. The sludge may be filtered prior to preheating, prior to the admixing with air and steam or after treatment. This method is applicable for not only sewage but also for petrochemical waste water, food-processing wastes and the like. Bad odors may be easily removed from the treatment system and by filtering effectively, the life of the apparatus may be significantly prolonged. In addition to these advantages, the process also provides for effective treatment of the sludge at relatively low temperatures thereby reducing the adhesion of scales of baked sludge to the heat exchanger.
218653
Kinugasa Yoshihiro
Shimizu Ko
Toda Ichiro
Uede Kenichi
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