Purification of industrial waste waters by flotation
US3975269A · kind A · utility
25Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Jun 12, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/24
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of purifying industrial waste water wherein microbubbles consisting primarily of oxygen, hydrogen, or air having certain micron sizes and of sufficient number and volume wherein formed particles with or without the use of a coagulant in the water are attracted to said bubbles by difference in electrostatic charge to form embryo flocs is disclosed. The addition of a polyelectrolyte is then made wherein a full floc is formed which includes the microbubbles. This light floc is promptly surfaced by the buoyance factor provided by the microbubbles. The process is suitable for all types of industrial waste water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.