Correction method for contaminated sites
US4948297A · kind A · utility
Inventor
Key dates
| Filing date | Jul 24, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Jul 24, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/901
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The method essentially creates a lake, if one does not already exist, and uses this lake as a "moving" biological treating pond for contaminated soil sites. Contaminated soil from one side of the lake is dragged into the lake, the water of which is infested with contaminant-consuming micro-organisms, then is tilled at the bottom of the lake to fully expose the soil to biological treatment, and then is raked upwardly along an opposite side of the lake to form a shoreline of cleaned soil material. The earthmoving process is repeated until the lake has passed through the treated all of the contaminated soil site. The method performs all decontamination on-site and avoids the requirement for any backfilling of the side after decontamination of the site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.