Enhanced Biodegradation Through Soil Venting.
Final rept. 23 Jun 89-22 Aug 90
BATTELLE MEMORIAL INST COLUMBUS OH
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The objective of this report was to investigate the potential for enhanced biodegradation of JP-4 jet fuel in the vadose zone by providing O2 through soil venting with added moisture and nutrients. Two treatment and two background plots were used, with different combinations of venting, moisture and nutrient additions at each one. Biodegradation rates varied from 2 to 20 mgkgday, with an average of 5 mgkg day. Moisture and nutrient addition had no apparent effect on biodegradation rates. The effects of soil temperature on biodegradation rates were shown to approximate effects predicted by the Vant Hoff-Arrhenius equation. In one treatment cell, approximately 26 kg of hydrocarbonscontaminants were volatilized and 32 kg were biodegraded. Although this equates to 55 percent of the total removal attributed to biodegradation, a series of flow rate tests showed that removal due to biodegradation could be increased to 85 percent by simply managing the air flow rates. Proper design and air flow management could result in complete biological mineralization of jet fuel, thereby reducing remediation costs.
- Soil Mechanics
- Solid Wastes and Pollution and Control