Method and plant for thickening sludge derived from water treatment by flocculation-decantation with ballasted floc
US6966993B2 · kind B2 · utility
18Cited by
10References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2002 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | May 18, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2305/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is provided for thickening sludge produced through a ballasted flocculation process. The sludge and granular material from the ballasted flocculation process are directed to a sludge separator where the sludge is separated from the granular material. Thereafter the separated sludge is sent to a degassing area and the sludge is degassed. A flocculating agent is mixed or injected into the sludge. The sludge is directed to a sludge thickener with a load at a sill calculated on the surface of the thickener greater than 200 kgMIS/m2/day. This process produces a thickened sludge having a concentration greater than 10 gm/I.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.