Method for treating mechanical pulp plant effluent
US5174859A · kind A · utility
9Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Apr 10, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/05
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for treating a mechanical pulp plant effluent waste stream by freezing the effluent stream and separating frozen product. The frozen product contains between about 50 to 150 ppm chemical oxygen demand (COD), and may be reclaimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.