Dewatering of suspensions
US5846433A · kind A · utility
26Cited by
8References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 16, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Apr 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A suspension is dosed with a coagulant and then with a flocculant and is dewatered to form a thickened sludge or cake and separated liquor, and control of the dewatering performance is improved by adding the flocculant at a predetermined dosage, monitoring the charge in the separated liquor (or monitoring other dewatering parameter of the separated liquor or suspension) and adding coagulant at a dosage selected in response to the monitored charge or other parameter value in order to maintain the value substantially at a preselected optimum value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.