Method of treating waste water
US4981599A · kind A · utility
10Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 10, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | May 10, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/66
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for treating industrial waste water prior to its discharge into the city or county sewer system is provided. The method includes introducing into the waste water an iron-containing compound, a hydroxide and a flocculating agent. This method results in the formation of a sludge cake layer on top of the waste water. The sludge cake is then removed, and the treated waste water is discharged into the sewer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.