Waste water treatment
US4216089A · kind A · utility
10Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1978 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | May 17, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Gases are dissolved in aqueous liquids and sludges by employing the preliminary step of subjecting the liquids to a reduced pressure to remove incidental gases dissolved or contained therein, and then dissolving the required gases therein. The invention is of particular utility in the oxidative treatment of surface waters, waste waters or sewage, in which the latter are first de-gassed before being oxygenated. The degassing can be effected by, for example, using a siphon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.