Method for operating a biological sewage purification plant
US4406790A · kind A · utility
3Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1982 |
| Grant date | Sep 27, 1983 |
| Priority date | — |
| Expiry date | Jul 9, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/76
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus for operating a biological sewage purification plant wherein the water to be treated is aerated in a tank containing bacteria by means of a rotating impeller or the like, characterized in that a heating medium, preferably steam, is fed onto the surface of the water to maintain it at the optimum temperature for facilitating decomposition by bacteria without excessive heating and resultant destruction of the bacteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.