Device for purifying sewage
US3980561A · kind A · utility
14Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1975 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Mar 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A device for purifying sewage by employing a bed of aerobes or activated sludge characterized by the use of a movable air supply means which is moved across the bottom portion of the bed to apply a concentrated supply of air to a limited portion of the bed to effect air washing of the bed and also applies the air washing to the entire bed in a predetermined period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.