Process and installation for biological treatment, e.g. by nitrification and/or denitrification, of an effluent including nitrated pollution
US5192441A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Sep 11, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the biological treatment by nitrification and/or denitrification of an effluent containing nitrogen pollution includes the following steps: PA1 an incident flow of this water is brought into a mixing zone with at least one compartment in which, by turbulent mechanical agitation, an inconsumable and insoluble granular material, loaded with biomass, is put in homogeneous suspension in this water, and is maintained at a more or less constant mass concentration; PA1 this water and this granular material in suspension are circulated in a separation zone from which is extracted on the one hand clarified water, and on the other hand biomass loaded granular material; and PA1 almost all of the active biomass fixed on said granular material is brought back by forced recycling to the mixing zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.