Water purification process 2
US5190655A · kind A · utility
6Cited by
5References
7Claims
0Family size
Inventor
Key dates
| Filing date | Sep 26, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Sep 26, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention relates to a process at the purification of water, in particular sewage water, comprising a nitrification process and a denitrification process during simultaneous decomposition of a pre-precipitated sludge of sewage water. The invention is characterized in that decomposed sludge or solutions of sludge of a chemical pre-precipitation of sewage water is added as a source of carbon at the denitrification step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.