Blacks dry cleaner Tetrachloroethene remediation project

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Courtesy of JRW Bioremediation, LLC

Background

  • PCE source area in soil and groundwater at an active dry cleaner.
  • Performed demonstration of Bioavailability Enhancement Technology (B.E. T.rM patent pending).
  • B.E. T.  is a source area bioremediation technology that enhances the dissolution of the chlorinated solvent contaminant and provides an electron donor for anaerobic reductive dechlorination (ARD).
  • WIL CLEAR Sodium Lactate electron donor injected In an existing monitoring well using a simple metering device and garden hose.

Accomplishments

  • A single injection of WILCLEAR provided the system with greater than 1,000 mg/L of total organic carbon in a downgradient monitoring well.
  • A single injection resulted in the onset of methanogenic conditions, the conditions under which ARD of chloroethenes is energetically favorable.
  • The bioavailability and biodegradation of primary solvents was enhanced after a single injection - PCE and TCE decreased immediately and cis-1,2-DCE increased to concentrations significantly greater than the original PCE/TCE levels.
  • It Is expected that complete ARD to ethene will commence following continued injection and biomass growth.

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