ripsnup,
A DOE site at INEEL in Idaho has had fantastic success remediating TCE DNAPL using WilClear lactate concentrate (http://www.jrwbioremediation.com/WILCLEAR.htm) A case study can be found at (http://www.jrwbioremediation.com/Presentations/DryCleanerPresentation_files/frame.htm) and a...
Thebigdog,
What has lead you to believe that your concentrations are too high for an enhanced bio approach? I am aware of several sites that treat either PCE or TCE DNAPL source areas and actually achieve better than expected results because the dechlorinators occupy an ecological niche and...
gen013,
Our expertise is in sodium lactate and chitin for soluble and slow release hydrogen donors. For sodium lactate, we target initial in situ concentrations in the treatment volume (treatment area times saturated thickness times effective porosity) of 1000 mg/L. If you assume a factor of 8...
IsaacA is expressing the commonly held belief that in situ bio will stall out at cis-DCE. In most cases that stall out it is because of inadequate reducing conditions. To get past cis-DCE it is necessary to drive the ORP down to sulfate reducing conditions. The most popular slow release...
I have to respectfully disagree with one point that jeffraines makes when he says, "I don't think in-situ bio will do anything for free product." Resent field studies and full scale remediations have shown that in-situ bio is probably the most cost effective method of cleaning up...
groundwork,
IMHO in-situ bioremediation of PCE with sodium lactate has proven over the last 4 years to be a very economical approach to remediating dry cleaning sites contaminated with PCE. The sodium lactate is diluted to 5-20% of the delivered concentration and then injected into the...
