Patent ID: 6068134
Filing Date: 2000-05-30
Classification: B01D

Abstract:
In a clarifier which forms part of a sewage treatment system, the clarifier having a clarifier basin, an influent center pier column in the basin, a drive cage which is rotatable and which generally surrounds the influent center pier column, and one or more elongated rake arms which extend radially outwardly from and rotate with the drive cage, extending generally to an outer wall of the clarifier basin, and the clarifier also including an influent flocculation skirt surrounding the influent center pier column and drive cage and extending above and below the liquid surface in the clarifier basin and defining an influent well around the drive cage and influent center pier column, a scum collection system within the influent well, comprising:an elongated scum collection trough secured on and generally parallel to each rake arm, within the influent well,surface scum collection means within the influent well for gathering floating surface scum and other floatables within the influent well and delivering said scum and other floatables to said collection trough, andscum discharge means connected to the influent center pier column for receiving the scum and other floatables from the scum collection trough and delivering the scum and floatables to a position exterior of the center pier column, separate from other waste streams out of the clarifier, for separate treatment or disposal.