Halogenated solvent remediation

Liquid purification or separation – Processes – Treatment by living organism

Reexamination Certificate

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Reexamination Certificate

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07141170

ABSTRACT:
Methods for enhancing bioremediation of ground water contaminated with nonaqueous halogenated solvents are disclosed. An illustrative method includes adding a composition to the ground water wherein the composition is an electron donor for microbe-mediated reductive dehalogenation of the halogenated solvents and enhances mass transfer of the halogenated solvents from residual source areas into the aqueous phase of the ground water. Illustrative compositions effective in these methods include whey powder, liquid whey, and mixtures of ethyl lactate and C2or higher carboxylic acids or hydroxy acids, salts thereof, esters thereof, or mixtures thereof.

REFERENCES:
patent: 6322700 (2001-11-01), Suthersan
patent: 6632364 (2003-10-01), Suthersan
patent: 6783678 (2004-08-01), Sorenson
patent: 2004/0157317 (2004-08-01), Sorenson et al.
“Remediation Kiosk: Realities of enhanced reductive dechlorination” (Apr. 2003) published at http://www.pollutionengineering.com/CDA/ArticleInformation/features/BNP—Features—Item/0,6649,108263,00.html.
Technical Protocol for Using Soluble Carbohydrates to Enhance Reductive Dechlorination of Chlorinated Aliphatic Hydrocarbons, p. 1-13 (Dec. 2002) (whey as an electron donor at p. 1), see www.estcp.org/viewfile.cfm?doc=CU-9920-PR-01.pdf.

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