Method and apparatus for sewage grit removal
US8715511B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2009 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Nov 3, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus and method are provided for separating grit from liquid sewage while retaining organic solids in suspension. A sustained rotational liquid sewage first fluid flow, an induced upward liquid sewage second fluid flow, and a sustained rotational liquid sewage third fluid flow are employed in an apparatus having a cylindrical grit settling main chamber, a grit storage secondary chamber including a central grit settling access top mouth opening, a vertical shaft, a means for causing rotation of the vertical shaft, and a partition extending transversely through the main chamber and forming upper and lower subchambers. A fluid flow speed gradient is established between the liquid sewage third fluid flow and the liquid sewage first fluid flow. In this manner, grit is separated from liquid sewage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.