Apparatus for the anaerobic filtration of waste water
US4561974A · kind A · utility
31Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Feb 2, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/801
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An apparatus for the anaerobic filtration of waste water includes a filter of filling material through which the waste water to be treated is passed from the bottom to the top. The filter includes upper and lower superposed layers of filling material separated by an intermediate layer of material. The lower layer is in the form of an ordered arrangement of the material thereof. The upper and intermediate layers each include a loosely packed arrangement of the material thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.