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Pilot‐scale evaluation using bioaugmentation to enhance PCE dissolution at dover AFB national test site
Author(s) -
Lebrón Carmen A.,
McHale Timothy,
Young Robroy,
Williams Dale,
Bogaart Matthew G.,
Major David W.,
McMaster Michaye L.,
Tasker Ian,
Akladiss Naji
Publication year - 2007
Publication title -
remediation journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.762
H-Index - 27
eISSN - 1520-6831
pISSN - 1051-5658
DOI - 10.1002/rem.20121
Subject(s) - bioaugmentation , bioremediation , environmental remediation , environmental science , microbial consortium , biodegradation , human decontamination , waste management , dissolution , environmental engineering , environmental chemistry , contamination , chemistry , engineering , chemical engineering , microorganism , ecology , biology , bacteria , genetics , organic chemistry
An Interstate Technology and Regulatory Council (ITRC) forum was recently held that focused on six case studies in which bioremediation of dense nonaqueous‐phase liquids (DNAPLs) was performed; the objective was to demonstrate that there is credible evidence for bioremediation as a viable environmental remediation technology. The first two case studies from the forum have been previously published; this third case study involves a pilot‐scale demonstration that investigated the effects of biological activity on enhancing dissolution of an emplaced tetrachloroethene (PCE) DNAPL source. It used a controlled‐release test cell with PCE as the primary DNAPL in a porous media groundwater system. Both laboratory tests and a field‐scale pilot test demonstrated that bioaugmentation can stimulate complete dechlorination to a nontoxic end product and that the mass flux from a source zone increases when biological dehalorespiration activity is enhanced through nutrient (electron donor) addition and bioaugmentation. All project goals were met. Important achievements include demonstrating the ability to degrade a PCE DNAPL source to ethene and obtaining significant information on the impacts to the microbial populations and corresponding isotope enrichments during biodegradation of a source area. © 2007 Wiley Periodicals, Inc.