Corporate HDQ:

ETAS Corporation
2616 S. Loop W.
 (I-610 Freeway)
Suite 595
Houston, TX 77054

Office: (713) 569-5582
Fax: (713) 349-0683

Treatability Sutdies and Design: Prj-165

Services Provided

Treatability, Feasibility Study

Technologies Used

Bioremediation: Co-metabolic
    denitrification of groundwater


Radioactive, Hazardous
Commercial Client


Bioremediation through innovation

Title: Groundwater Treatability Testing and Evaluation

Client: Sequoyah Fuels Corporation
Gore, Oklahoma

The purpose of this project was to support a groundwater Feasibility Study by conducting bench-scale and field -scale treatability studies to determine if a bioremediation co-metabolic technology could be effectively used to remediate arsenic contaminated groundwater. The technology premise suggests that a microbial population would grow as a result of denitrification. This growth was expected to have two effects on the arsenic affected groundwater. First, the bacterial action would break down the relatively mobile organoarsenicals to become the less soluble arsenate precipitants. Second, the microorganisms would assimilate some of the arsenic into the biomass. As the soluble arsenic is converted to non-soluble arsenic residing within the biomass (referred to as bio-uptake), the affected groundwater would then become remediated. It is based on this principle that this co-metabolic process was identified as a potential groundwater remedial alternative. To ensure this technology would be an effective alternative for groundwater remediation, ETAS Corporation conducted two feasibility studies: first, a laboratory study to ensure that the groundwater from the Sequoyah Fuels facility was amenable to bio-arsenic uptake, and second, follow-up field testing to confirm that the arsenic-laden bio-mass would be relatively immobilized.

Accomplishment s: ETAS Corporation was able to demonstrate through the treatability studies that a significant drop of arsenic concentrations provided a strong indication that some co-metabolic processes occurred in arsenic uptake during microbial activities within the groundwater collected from Sequoyah Fuels. It was concluded that the groundwater from Sequoyah Fuels is amenable to biological uptake of arsenic during nitrification/denitrification activities, offering a practical and cost-effective solution for in-situ groundwater remediation.


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