Advanced oxidation process of degrading nonsteroidal anti-inflammatory drugs in sewage by UV persulfate
US10233103B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2017 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Jun 18, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2305/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention discloses an advanced oxidation process of degrading nonsteroidal anti-inflammatory drugs in sewage by UV persulfate. The sewage flows to a secondary sedimentation tank by gravity, and sediments are precipitated and separated. Na2S2O8 solution is added therein, and a UV lamp is opened. Effluent result is analyzed after photooxidation. The sewage is transferred into a contact disinfection pool to react with ClO2 before discharging safely. The present invention uses a UV-based advanced oxidation process, which can effectively remove the nonsteroidal anti-inflammatory drugs in sewage, meets the requirements of sewage discharging, and decreases the environmental risk of nonsteroidal anti-inflammatory drugs. The method has some advantages such as simple equipments, easy operation, reasonable economy, as well as efficient treatment effect and high stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.