Intrachannel clarifier
US4952310A · kind A · utility
Inventors
Key dates
| Filing date | Jul 7, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Jul 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/926
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An intrachannel clarifier for an oxidation ditch includes an enclosure positioned in the flow path of the oxidation ditch. This enclosure defines a perimeter wall which surrounds an internal volume made up of an upper zone, a middle zone and a lower zone. The cross-sectional area of the internal volume increases progressively from the lower zone to the upper zone. A water inlet port introduces waste water from the flow path into the lower zone, a submerged pipe in the upper zone removes clarified water from the upper zone, and sludge is actively removed from the middle zone via a sludge removal manifold disposed in the middle zone to reduce the residence time of sludge in the middle zone while maintaining a filter blanket of sludge in the middle zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.