This document provides information needed for comparing passive bioventing to conventional bioventing on the basis of performance, installation and operating costs, and implementation issues. The primary demonstration objective was to identify a site where passive bioventing would be successful. The secondary objective was to measure the rate of airflow and radius of oxygen influence as the result of operating a pilot-scale passive bioventing system that consisted of one vent well ...
This report is for ESTCP Project CU-9715. Bioventing involves injecting air into unsaturated (vadose zone) soils to provide indigenous aerobic soil microorganisms with oxygen needed to accelerate the biodegradation of contaminants that are susceptible to aerobic metabolism. While conventional bioventing uses an electric blower to transfer the air, passive bioventing relies on daily changes in atmospheric pressure to move air through vent wells screened within the contaminated vadose zone. Usually ...
This Natural Pressure Driven Passive Bioventing Final Report describes the technical approach to evaluating the performance of passive bioventing at Castle Airport (formally Castle Air Force Base) in Merced, California. The Environmental Technology Certification Program (ESTCP) sponsors the project. The purpose of the project was to demonstrate that passive bioventing can be employed to remediate soil contamination without the use of electric blowers. Passive bioventing is an effective, low-cost remedial ...
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