In-well device for in situ removal of underground contaminants

Details In-well device for in situ removal of underground contaminants In-well device for in situ removal of underground contaminants

1995-10-16

1996-11-26

Suchfield, George A.

Wells

Processes

Using microorganisms

166106, 16625001, 166370, 166371, 210170, 210205, 210617, 210747, 405128, B09C 110, E21B 4312

Patent

active

055775586

ABSTRACT:
A method and apparatus for achieving in situ bioremediation of volatile contaminants in the vapor phase and dissolved or dispersed contaminants in the groundwater phase at a contaminated site. The apparatus of this invention is configured to be used within a remediation well of the type employed with vapor extraction and dewatering techniques, and serves to biologically treat soil contaminants in situ with microbes and any suitable microbial nutrients. As such, the present invention is adapted to be employed in conjunction with vapor extraction and dewatering remediation techniques to treat vapor and water-borne contaminants more effectively. The apparatus securely retains the microbes in a manner that serves to prevent leaching into the surrounding soil while simultaneously protecting the microbial population from predatory, competitive and inhibitory microorganisms.

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patent: 5171104 (1992-12-01), Bernhardt
patent: 5190405 (1993-03-01), Vinegar et al.
patent: 5220958 (1993-06-01), Bernhardt
patent: 5302286 (1994-04-01), Semprini et al.
patent: 5318698 (1994-06-01), Bernhardt
patent: 5387057 (1995-02-01), De Loach
patent: 5398757 (1995-03-01), Corte et al.

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