Waste water treatment, media therefor and its manufacture
US5948262A · kind A · utility
17Cited by
9References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 12, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Aug 12, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Particulate material for use in waste water treatment. The material comprises granules of a plastic material (e.g. poly-ethylene), each of which contains a plurality of grains of a substantially inert mineral (e.g. sand) coated thereon to provide a habitat for microorganisms effective in waste water treatment. The granules will have a predetermined particle size which is governed by the particle size range of the granules, e.g 3-10 mm and the grains will have a predetermined particle size range, e.g. 0.1-3.5 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.