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US 2018/0002208 A1Published application
Wastewater Treatment System
AssigneeEvoqua Water Technologies LLC
InventorsThomas J. Larsen, Mark Pamperin, John Hartwick
Life of this patent
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Abstract
A system and method for treating wastewater includes two or more biological reaction zones separated by chamber walls. The system and method for treating wastewater includes static recycle of a mixed liquor from a second biological reaction zone to a first biological reaction zone.
Claims15
-25. (canceled)
A method for retrofitting an oxidation ditch having multiple adjacent moving biological reaction zones, the biological reaction zones sharing a common intermediate chamber wall, comprising:
- positioning at least one opening in the common intermediate chamber wall;
- and
- positioning a baffle along the common intermediate chamber wall and adjacent to the opening to statically recycle the mixed liquor from an inner biological reaction zone to an outer biological reaction zone through the opening at a rate of two to four times an influent flow rate to the outer biological reaction zone.
A wastewater treatment system comprising:
- multiple adjacent biological reaction zones, the biological reaction zones sharing a common intermediate chamber wall having at least one opening;
- and
- a baffle secured to the common intermediate chamber wall adjacent the opening at an angle to the common intermediate chamber wall, the baffle projecting into an inner zone of an inner biological reaction zone.
A wastewater treatment system comprising:
- multiple concentric biological reaction zones, the biological reaction zones sharing a common intermediate chamber wall having at least one opening;
- an influent stream fluidly connected to a wastewater source and an outer biological reaction zone of the wastewater treatment system;
- a baffle secured to the common intermediate chamber wall, the baffle projecting into an inner portion of an inner biological reaction zone of the wastewater treatment system;
- and
- an effluent stream fluidly connected to an inner biological reaction zone and a downstream point.
2 more elements
Dependencies are inferred from the claim text.