Method of processing refuse and/or sludge and a plant for carryi

Details Method of processing refuse and/or sludge and a plant for carryi Method of processing refuse and/or sludge and a plant for carryi

1974-11-22

1976-06-01

Spear, Jr., Frank A.

Chemistry: fertilizers

Processes and products

Bacterial

232591, 34174, 71 14, C05F 1108, F26B 1712, C05F 904, C05F 306

Patent

active

039605370

ABSTRACT:
A method and apparatus for biologically treating refuse or thickened sludge to form compost utilizes a vertical cylindrical chamber havng an upper inlet aperture and a lower outlet aperture. An axial shaft located within the chamber has mounted thereon a plurality of radial arms each having a plurality of gas distributor blades. Sets of arms are spaced axially along the shaft. The chamber wall is formed in part by a plurality of hollow, cylindrical exhaust ducts concentrically arranged and extending differing distances along the chamber side. The end of each duct is flared to form an exhaust aperture which extends around the entire chamber. Material to be treated enters the chamber at the upper inlet and fills the chamber. The rotating radial arms and blades distribute a treating gas mixture to the material, which gas is exhausted by the annular exhaust apertures and exhaust ducts. The treating gas, heated by the process, is used to heat a portion of material which has been treated, and this portion is recirculated to be admixed with incoming material to be treated.

REFERENCES:
patent: 1251573 (1918-01-01), Provost
patent: 2474833 (1949-07-01), Eweson
patent: 3270437 (1966-09-01), Lara et al.
patent: 3357812 (1967-12-01), Snell
patent: 3756784 (1973-09-01), Pittwood

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