Low-carbon near zero emission process of industrial waste water
US12358823B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2024 |
| Grant date | Jul 15, 2025 |
| Priority date | — |
| Expiry date | Oct 22, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/131
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A low-carbon near zero emission process of industrial waste water, comprising: S1: entering industrial waste water into a pre-oxidation system to improve biodegradability of organics; S2: after treatment in the pre-oxidation unit, entering the waste water into an anaerobic biological treatment system, sodium chloride and sulfate is deeply removed and carbon sources in the waste water can be used to remove the sulfate and nitrate; S3: entering water output from the anaerobic biological treatment system into a membrane concentration system and membrane concentrated solution enters a nano-filtration salt fractionation system for salt fractionation; and S4: refluxing nano-filtration concentrate solution generated by the nano-filtration salt fractionation system to the anaerobic biologic treatment system for biological desulfurization, or synthesizing the nano-filtration concentrate solution to be sodium persulfate by electro chemical methods, and refluxing proportionately to a waste water pre-oxidation system for use in-situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.