Method and apparatus for remediating contamination in soils

Details Method and apparatus for remediating contamination in soils Method and apparatus for remediating contamination in soils

1994-03-24

1998-11-03

Taylor, Dennis L.

Hydraulic and earth engineering

Soil remediation

In situ contaminant removal or stabilization

166246, B09B 300

Patent

active

058299181

ABSTRACT:
In a method of remediating contamination in soils of the vadose zone at least one injection well and at least one extraction well are established in the soil. Oxygen-containing gas such as air is injected into the injection well. A vacuum is applied to the extraction well for extracting the air together with volatile contaminants through the extraction well. The air and volatile contaminants are returned into the injection well. A biological medium containing microbes is continuously added to the air to be returned into the injection well for introducing the biological medium into the soil. The apparatus for remediating contamination in soils of the vadose zone includes at least one injection well and at least one extraction well to be placed in the soil. The apparatus has a device for injecting air into the injection well. A device for applying a vacuum to the extraction well for extracting the air together with volatile contaminants is provided. A return line connects the extraction well to the injection well for returning the air and volatile contaminants into the injection well. The apparatus also has a device for continuously adding to the air a biological medium for introduction into the soil.

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