FEASIBILITY OF BIODEGRADATION OF TETRACHLOROETHYLENE IN CONTAMINATED AQUIFERS

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 7476
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1988
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Cambridge Analytical Assoc Inc
1106 Commonwealth Avenue, Boston, MA, 02215
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 SAMUEL FOGEL PHD
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
CHLORINATED SOLVENTS SUCH AS TETRACHLOROETHYLENE, HAVE BEEN SPILLED AND DISPOSED OF ON SOIL AND HAVE BEEN TRANSPORTED TO THE GROUND WATER, CAUSING WIDESPREAD AQUIFER CONTAMINATION. THESE COMPOUNDS ARE OF CONCERN BECAUSE OF THEIR TOXICITY AND SUSPECTED CARCINOGENICITY. CHLORINATED SOLVENTS HAVING THREE OF FEWER CHLORINE ATOMS ARE READILY DEGRADED UNDER AEROBIC CONDITIONS BY METHANE-UTILIZING BACTERIA. TETRACHLOROETHYLENE, HOWEVER, CAN NOT BE DEGRADED BY THOSE AEROBIC BACTERIA. TETRACHLOROETHYLENE CAN, HOWEVER, BE PARTIALLY DECHLORINATED BY ANAEROBIC BACTERIA. CAA BIOREMEDIATION SYSTEMS PROPOSES TO DEVELOP A SEQUENTIAL ANAEROBIC/AEROBIC BIODEGRADATION PROCESS TO BE APPLIED IN THE IN SITU TREATMENT OF TETRACHLOROETHYLENE CONTAMINATED AQUIFERS. THE FEASIBILITY OF THIS APPROACH IS TO BE DEMONSTRATED IN A LABORATORY SCALE AQUIFER SIMULATOR IN WHICH GROUND WATER IS SELECTIVELY AMENDED TO STIMULATE GROWTH OF APPROPRIATE MICROBIAL COMMUNITIES AND IS RECIRCULATED THROUGH CONTAMINATED SOIL. TETRACHLOROETHYLENEIS EXPECTED TO DEGRADE TO TRICHLOROETHYLENE, DICHLOROETHYLENE, AND VINYL CHLORIDE UNDER ANAEROBIC CONDITIONS. IN THE SECOND STEP, THESE COMPOUNDS WILL BE MINERALIZED BY THE METHANE-UTILIZING BACTERIA.

* information listed above is at the time of submission.

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