Biological filter apparatus with multiple filter units
US6790653B2 · kind B2 · utility
1Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Dec 20, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/821
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Air laden with biodegradable volatile organic compounds is passed sequentially through a first filter bed containing a biologically inert filter media, a second filter bed containing a biologically active filter media, and a third filter bed containing a biologically inert filter media. Water is present in the biologically active filter media and the biologically inert filter media. Water that drains from the second filter bed is collected and supplied to the first filter bed. Water that drains from the third filter bed is collected and recirculated to the third filter bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.