Method and installation for the biological treatment of water using activated sludge and comprising aeration regulation
US7473365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2004 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Sep 25, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The biological water or wastewater treatment process described herein alternates aeration and anoxic phases during a water treatment process. According to one exemplary process, the water or wastewater is directed into a biological tank. The water or wastewater in the biological tank is aerated until measured nitrate or redox values meet high nitrate or high redox set value conditions relative to minimum aeration and maximum aeration time requirements. Subsequently, the water or wastewater is subjected to anoxic treatment until the measured nitrate value meets low nitrate set value conditions relative minimum and maximum anoxia time requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.