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In a continuing effort to develop environment-friendly and cost-effective remediation technologies, the Land Remediation and Pollution Control Division (LRPCD) conducts an aggressive research and development program in bioventing. LRPCD's bioventing program is multi-faceted, with completed and ongoing laboratory and field research projects, addressing soil contaminants as varied as fuels, PAHs, and perchloroethylene (PCE). Bioventing is an in-situ bioremediation process that promotes aerobic biodegradation of organic contaminants. Typically, vadose zone soils contaminated with compounds that are biodegradable under aerobic conditions, such as fuels like diesel and jet fuel, and non-chlorinated solvents like acetone, are depleted of oxygen. The low oxygen conditions develop because available oxygen has been used by indigenous microorganisms in an attempt to metabolize the contaminants. Thus, to promote the rapid biodegradation of the contaminants, oxygen must be delivered to the contaminated area at an adequate rate. Bioventing is the process of delivering air at a low flow rate such that the oxygen supply rate meets the demand by the microorganisms and minimizes volatilization of volatile contaminants. For further information on this effort, visit the website at http://www.epa.gov/ORD/NRMRL/lrpcd/tdb/Research-Programs_files/Biov_fact.htm. To access directly from this website, click on downloads on the navigation bar.

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