SOY BASED AEROBIC CO-METABOLISM OF CHLORINATED HYDROCARBONS AND FLUOROCARBONS
Publication Date: 2003-Jul-15
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An innovative aerobic co-metabolism technique for rapid and cost effective remediation of chlorinated hydrocarbons and fluorocarbons in groundwater has been identified and tested at a Dow Chemical Company (DOW) facility in West Virginia. Bench scale testing was performed to refine the physical and mechanical aspects of the technique and to evaluate various products and mixtures to be used as the co-metabolite. A commercially available soy oil mixture was developed and used in a multi-step process that combines liquid/liquid extraction and co-metabolic processes to achieve rapid and highly cost effective reduction in aquifer contaminant concentrations. Two field-scale tests were performed and the results monitored over an 8-month period. Field and laboratory data collected during the monitoring period indicate that the technique has been highly effective for the removal of carbon tetrachloride and trichlorofluoromethane. Decreases of greater than 99 percent in contaminant concentrations in individual wells and site-wide decreases of greater than 90 percent have been achieved in less than 8 months.