David M Tobin

Author:

David N. Tobin

ISBN #:

0138913749

Author:

David N. Tobin

ISBN #:

0835714136

US Patent:

45419337, Sep 17, 1985

Filed:

May 14, 1984

Appl. No.:

6/610132

Inventors:

Clark W. Armold - Spring TX
Michael B. Huebner - Houston TX
David Tobin - Charlotte NC

International Classification:

B01D 2126

US Classification:

210780

Abstract:

A process and apparatus for removal of ash from a waste activated sludge stream includes a pressure regulator for controlling the pressure of incoming waste activated sludge containing water or supernatant, carbon and ash as suspended solids; a first stage separation including a plurality of parallel mounted hydrocyclones for receiving the controlled pressure incoming waste activated sludge for separation into a first fluid output containing substantially supernatant and carbon and a second fluid output containing a greater concentration of ash; and a second separation stage including a vibrating screen which receives the second fluid output from the first separation stage, such vibrating screen allowing substantially only the passage of supernatant and carbon therethrough thus producing a third fluid output and a fourth output of ash concentrate which can be ultimately removed from the process.