Water treatment device and water treatment method using the same
US7157012B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2004 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Aug 14, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Object of the preferred embodiment is to remove sol-form microparticles and nitrogen components contained in CMP wastewater. Sol-form microparticle components contained in CMP wastewater are removed by a filtration treatment using a filter device 13, having a gel-form second filter. Also, nitrogen components in the CMP wastewater are removed by an electrochemical treatment using electrode 12. The filtration treatment and the electrochemical treatment can be carried out in individual tanks or can be carried out in the same tank. By performing the filtration treatment and the electrochemical treatment in the same tank, a space-saving water treatment device can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.