Fluidized bed wastewater treatment apparatus
US7922897B2 · kind B2 · utility
1Cited by
7References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2009 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Oct 13, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/906
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluidized bed reactor for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. The diameter of the column changes stepwise between the sections. A flow velocity in excess of 100 cm/min is maintained in a lowermost one of the sections and lower flow velocities are maintained in subsequent sections. A struvite supersaturation ratio is controlled in part by recycling wastewater from an outlet of the column. Struvite pellets are removed periodically from the bottom of the column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.