Enhancement of in situ microbial remediation of aquifers
US5265674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Feb 20, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D31/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Methods are provided for remediating subsurface areas contaminated by toxic organic compounds. An innocuous oil, such as vegetable oil, mineral oil, or other immiscible organic liquid, is introduced into the contaminated area and permitted to move therethrough. The oil concentrates or strips the organic contaminants, such that the concentration of the contaminants is reduced and such contaminants are available to be either pumped out of the subsurface area or metabolized by microorganisms. Microorganisms may be introduced into the contaminated area to effect bioremediation of the contamination. The methods may be adapted to deliver microorganisms, enzymes, nutrients and electron donors to subsurface zones contaminated by nitrate in order to stimulate or enhance denitrification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.