High solubility gas flotation in liquid-solid separation
US4267050A · kind A · utility
15Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1979 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Mar 21, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
BOD-containing water is purified by oxygenation. The resulting sludge is subjected to flotation with a gas having a solubility in water higher than that of air. The preferred source of high solubility gas is the vent gas from the oxygenation zone or stack gas obtained by burning methane generated by anaerobically digesting the floated solids. Removal of insoluble contaminants from bacterial or bacterial-algal pond effluent using high solubility gas flotation is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.