Wastewater flotation utilizing streaming potential adjustment
US4219417A · kind A · utility
10Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Oct 25, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/465
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A flow of wastewater is adjusted to near zero streaming potential by injecting a non-coagulant mineral acid or base into the wastewater. The potential is measured in streaming detector units. The thus adjusted flow enters a basin where it is subjected to a decreasing gradient of small bubbles to form and separate off a buoyant floc from which valuable materials are more readily recoverable, a floc of higher solids content, and a floc of lesser relative volume than other systems employing similar manipulative steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.