Arthur Austin

US Patent:

20040144735, Jul 29, 2004

Filed:

Aug 27, 2002

Appl. No.:

10/228382

Inventors:

Samuel Shepherd - Houston TX, US
Arthur Austin - Oviedo FL, US

International Classification:

C02F001/00

US Classification:

210/769000

Abstract:

A process for removing water from sludge including passing the sludge through a chamber, injecting carbon dioxide gas under pressure into the chamber as the sludge passes through the chamber, and flashing the carbon dioxide-injected sludge through an orifice into a vessel so as to release carbon dioxide gas from the sludge. The flashed sludge is dewatered to remove water from the sludge. The carbon dioxide gas is injected at no less than 25 p.s.i.g. of pressure.

US Patent:

20050109713, May 26, 2005

Filed:

Nov 30, 2004

Appl. No.:

10/999331

Inventors:

Samuel Shepherd - Houston TX, US
Arthur Austin - Oviedo FL, US

International Classification:

C02F011/12

US Classification:

210769000

Abstract:

A process for removing water from sludge has the steps of passing the sludge through a chamber, injecting carbon dioxide gas under pressure into the chamber as the sludge passes through the chamber, and flashing the carbon dioxide-injected sludge through an orifice into a vessel so as to release carbon dioxide gas from the sludge. The flashed sludge is returned to a digester or is dewatered to remove water from the sludge. The carbon dioxide gas is injected at no less than 14.7 p.s.i.a. of pressure.