decontamination of soil containing DDT contaminants

摘要

The present invention provides a process of decontaminating soil and/or sediments containing DDT type contaminants by converting these contaminants into harmless materials thereby decontaminating the soil to whatever extent desired, either partial decontamination or complete remediation. The treatment comprises 1. Forming a degradation zone comprising said soil and/or sediment; 2. Maintaining the degradation zone at a temperature in the range of about 15oC to 37oC, and maintaining a microbial population of at least 105cfu/g anaerobic and aerobic bacteria 3. Supersaturating said degradation zone with water and rendering it anaerobic 4. Maintaining supersaturated degradation zone at a redox potential level below about 200mV 5. Oxygenating the degradation zone to render it aerobic and maintaining it at a redox potential level above about positive 100mV 6. Repeating steps 1-5 as necessary