Sludge quality
US7638055B2 · kind B2 · utility
0Cited by
13References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2005 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jun 29, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention provides the use of an effective amount of a non-oxidizing water-soluble biocide in the improvement of sludge quality by reducing the sludge tendency towards bulking, wherein the biocide comprises an alkyl-substituted phosphonium compound, an alkyl-substituted phosphine, an alkyl-substituted phosphine condensate, or a polymeric quaternary ammonium compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.