Method of treating sewage sludge

Details Method of treating sewage sludge Method of treating sewage sludge

1976-08-30

1977-09-27

Sprague, Kenneth W.

Furnaces

With fuel treatment means

Preliminary refuse treatment means

110 8A, 110 12, 110119, F23G 512

Patent

active

040503909

ABSTRACT:
A method of treating sewage sludge is disclosed. The method makes use of an unitary multi-hearth furnace and the sewage sludge is dried in an upper part of the furnace and subjected to pyrolyzation in a lower part thereof to cause the sewage sludge to be reduced to ashes whereby a relatively small amount of exhaust gas is produced. The exhaust gas is also utilized as a heat supply source.

REFERENCES:
patent: 3344758 (1967-10-01), Wotschke
patent: 3697256 (1972-10-01), Engle
patent: 3707129 (1972-12-01), Kawashimo et al.
patent: 3771468 (1973-11-01), Kelly
patent: 3772998 (1973-11-01), Menigat

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