Water filtration system with waste water treatment
US11866350B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2020 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Oct 1, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/185
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A two-stage water treatment process. In a first stage, an incoming stream of water is processed to remove impurities and produce an outgoing stream of water usable for a first purpose and a waste stream of water not suitable for the first purpose. In a second stage, the waste stream of water is processed to remove hardness and alkalinity and produce a second outgoing stream of water suitable for a second purpose. In an exemplary embodiment, the first stage is a forward osmosis or nanofiltration process, and the first purpose includes production of potable water. The second stage includes the use of a weak acid cation resin system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.