Plastic media filter
US5449453A · kind A · utility
15Cited by
20References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 24, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | May 24, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter for removal of biochemical oxygen demand and suspended solids utilizing multi-layer filtration media. The filter media includes plastic particles, sand, and garnet and is operated under an automatic control condition. Fine filtering is accomplished by a sludge cake which develops at the upstream face of the filter media. For cleaning the filtration media, deposited sludge is removed from the filter bed by backwashing in a short time period at a high strength backwash flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.