Method for the biological treatment of wastewater using an aerobic granular biomass
US8999165B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 18, 2012 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | May 18, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/906
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for the biological treatment of wastewater containing pollutants, using an aerobic biomass, includes a plurality of successive cycles of a predefined duration in order to achieve pollutants removal efficiency of 90% or higher, each of the cycles including the following steps: —introducing a wastewater effluent containing phosphorus and calcium into a reactor containing biomass; —applying an aerobic phase by introducing into the reactor a gas flow containing oxygen for a predefined length of time, sufficient to form aerobic biomass granules; —decanting the aerobic biomass granules thus formed; —and removing at least part of the treated effluent. After each step of introducing effluent into the reactor, the pH in the reactor is maintained at a value above 8 for a length of time at least equal to 10% of the cycle duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.