Automatic control of biochemical oxygen demand content (BOD) of sludge and other products of a waste water treatment system
US10974176B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2018 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Feb 24, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of controlling an enhanced primary treatment (EPT) system that includes an EPT settling tank. A sludge drain discharges a sludge including BOD from the EPT settling tank and a clarified effluent discharge recovers decanted fluid from the EPT settling tank. A controller has at least one computer processor. A sludge sensor is communicatively coupled to the controller. The sludge sensor provides a sludge BOD concentration measurement, or a measurement from which the sludge BOD concentration is calculated. A process algorithm controls the sludge valve to control the discharge of the sludge by gravity or by pumping in response to data from the sludge sensor of the sludge BOD concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.