Method for high efficiency biological phosphorus and nitrogen removal in a sequencing batch reactor activated sludge process
US11643348B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2021 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Jun 25, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A wastewater treatment method applicable to new or existing enhanced biological phosphorus removal (EBPR) treatment process designs which utilize the sequencing batch reactor (SBR) process activated sludge process treatment tanks. The method improves the performance and efficiency in the treatment of municipal and industrial wastewater to remove phosphorus (P) and nitrogen (N). The method includes ceasing reaction cycles when a derivative of rate of change of the input flow volume of the air stream into the tank needed to maintain a low-range of dissolved oxygen (DO), in which an oxidation reduction potential (ORP) setpoint reaches a derivative value indicating that conversion of the ammonia nitrogen in the influent wastewater content to a nitrite or to a nitrate is complete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.