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IESI Develops Efficient Bacterial Culture to Degrade 1,4 -Dioxane
September 23, 2004
Innovative Engineering Solutions Inc. (IESI) has developed a new, more cost effective,
in-situ bioremediation technique for the destruction of 1,4 Dioxane, a widely distributed
groundwater contaminant commonly used as a solvent stabilizer, especially with
1,1,1Trichloroethane.
At an IESI project site in Salt Lake City, Utah, the IESI team cultured a propanotroph
(SL-D), an organism that can utilize propane as a sole carbon source. Site analysis
demonstrated that SL-D can aerobically degrade at least 10 mg/L of 1,4 Dioxane
within hours of application. The IESI team is currently evaluating the extent to which microorganisms
like SL-D are present at other project sites, and the extent to which the 1,4 Dioxane is
utilized for growth by the organism.
SL-D is more reactive and cost-effective than other treatment techniques. Typically, 1,4
Dioxane does not respond well to traditional technologies such as carbon adsorption or air
stripping. Even the most common treatment method for 1,4 Dioxane contaminated groundwater
-- ex-situ treatment using UV-hydrogen peroxide oxidation -- is very costly.
The SL-D culture is currently available for potential bioaugmentation in
full-scale applications. IESI has also developed techniques for the enrichment of native propanotrophs and engineered a safe and reliable dissolved propane subsurface delivery system.
Since 1995, IESI, a leading provider of environmental consulting services for the remediation of
contaminated properties, has been specializing in the design and implementation of
bioremediation systems for chlorinated volatile organics (CVOCs).
IESI has evaluated hundreds of sites, and is currently involved in over 40
full-scale enhanced anaerobic dechlorination and bioaugmentation projects utilizing injection of
cultured bacteria (when needed) for the degradation of contaminants.
For more information contact:
Sami Fam
(508) 668-0033 ext. 221
S.Fam@IESIOnline.com
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