Apparatus for reducing nitrate concentration in wastewater
US6332978A · kind A · utility
5Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2000 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Jan 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention is a method for reducing the nitrate concentration in wastewater within a wastewater treatment apparatus configured to define an aeration zone and a quiescent zone. The method comprises the step of ceasing airflow into the aeration zone for a predetermined time period or until the dissolved oxygen level within the wastewater has reached a predetermined threshold. The method may also comprise the step of mixing the wastewater in the aeration zone to prevent suspended particles within the wastewater in the aeration zone from settling and to avoid substantially disturbing the quiescence of the quiescent zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.