Screened decanter assembly for a settling tank
AssigneeTrans Terra Corporation
InventorTerry Wright
Life of this patent
Estimating the term…
Abstract
A driven decanter assembly for a wastewater primary treatment system, comprising a longitudinal decanter disposable in the wastewater and having a longitudinal trough and a horizontal entrance weir, a polygonal or arcuate screen attached to the decanter and having at least two screen surfaces disposable below the surface of the wastewater outside of the trough, and a floating baffle pivotably mounted to the decanter and disposable in the wastewater outside of the screen. The driven decanter assembly can directly replace a prior art driven decanter in any waste water primary treatment system.
Claims9
A decanter assembly for a wastewater primary treatment system, comprising:
- a) a longitudinal decanter disposable in said wastewater and having a longitudinal trough with a bottom and a horizontal entrance weir;
- b) a screen having a cross-sectional profile selected from the group consisting of polygonal and arcuate, said screen being attached to said decanter and having screen surfaces disposable above and below the surface of said wastewater outside of said trough;
- and
- c) a floating baffle pivotably mounted to said decanter and disposable in said wastewater outside of said screen.
A waste water primary treatment system, comprising:
- a) a settling tank;
- and
- b) a decanter assembly disposed in said settling tank, including,
- a longitudinal decanter disposable in said wastewater and having a longitudinal trough and a horizontal entrance weir,
- a screen having a cross-sectional profile selected from the group consisting of polygonal and arcuate, said screen being attached to said decanter and having screen surfaces disposable above and below the surface of said wastewater outside of said trough, and
- a floating baffle pivotably mounted to said decanter and disposable in said wastewater outside of said screen.
A method for self-backflushing of a decanter screen in a decanter assembly disposed in a waste water primary treatment system, wherein said screen functions to remove solids from wastewater by passing waste water liquid through said screen in a first direction and stopping said solids on a first surface of said screen, comprising the steps of:
- a) raising said decanter assembly above the surface of said waste water;
- and
- b) passing previously-screened waste water through said screen in a second direction opposite to said first direction to dislodge said solids from said first surface.
Dependencies are inferred from the claim text.