Patent ID: 6264834
Filing Date: 2001-07-24
Classification: B01D

Abstract:
A sewage treatment plant for separating solids and liquids from sewage sludge comprising:a source of sewage sludgea flat, stationary grating onto which the sludge is continuously conveyed, the grating having a plurality of strips that vary in spacing along the length of the grating, and wherein a ratio of spacing between the strips to their cross section is between 30% and 50%;a plurality of flexible blades movably mounted over the grating for scraping all of the sludge continuously therealong for pushing draining sludge from an inlet end of the grating to an outlet end thereof;a trough located below the grating and inclined downwardly from the outlet end to the inlet end;a drain located at a bottom end of the trough for draining liquid that has separated from the thickening sludge, and fallen into the trough, as the sludge is scrapped along the grating; andan outlet located at the outlet end of the grating for removing the thickened sludge from the grating.