Bioventing

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Bioventing is an in-situ [[bioremediation]] process that promotes aerobic biodegradation of organic contaminants in the unsaturated (vadose) zone. The method are suitable for fuels like gasoline, diesel and jet fuel, and non-chlorinated solvents like acetone. Typically, these pollutants will be biodegraded at aerobic conditions by indigenous heterotrophic [[microorganism]]s. Thus, in order to promote the natural degradation, air or poor oxygen is delivered to anaerobic and permeable polluted soil zones at a low flow rate such that the oxygen supply rate meets the demand by the microorganisms and minimizes volatilization of volatile contaminants.
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Bioventing is an in-situ [[bioremediation]] process that promotes aerobic biodegradation of organic contaminants in the unsaturated (vadose) zone. The method are suitable for fuel contaminants like gasoline, diesel and jet fuel. Typically, these pollutants will be biodegraded at aerobic conditions by indigenous heterotrophic [[microorganism]]s naturally occuring in the soil. Thus, in order to promote microbial degradation, air or poor oxygen is delivered to anaerobic and permeable polluted soil zones at a low flow rate such that the oxygen supply rate meets the demand by the microorganisms and minimizes volatilization of volatile contaminants.
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Prior to onset of bioventing, it is recommended to perform tests and measurements of the applicability of the method. These should include in situ respiration test, in situ air permeability test and measurements of pH, bioavailable nutrients and soil moisture. Bioventing is not recommended in case of low air permeability or limited bioactivity.
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Prior to onset of bioventing, it is recommended to perform tests and measurements of the applicability of the method. These should include an in situ respiration test, an in situ air permeability test and measurements of pH, bioavailable nutrients and soil moisture. Bioventing is not recommended in case of low air permeability or limited bioactivity.

Revision as of 19:24, 29 February 2008

Bioventing is an in-situ bioremediation process that promotes aerobic biodegradation of organic contaminants in the unsaturated (vadose) zone. The method are suitable for fuel contaminants like gasoline, diesel and jet fuel. Typically, these pollutants will be biodegraded at aerobic conditions by indigenous heterotrophic microorganisms naturally occuring in the soil. Thus, in order to promote microbial degradation, air or poor oxygen is delivered to anaerobic and permeable polluted soil zones at a low flow rate such that the oxygen supply rate meets the demand by the microorganisms and minimizes volatilization of volatile contaminants.

Prior to onset of bioventing, it is recommended to perform tests and measurements of the applicability of the method. These should include an in situ respiration test, an in situ air permeability test and measurements of pH, bioavailable nutrients and soil moisture. Bioventing is not recommended in case of low air permeability or limited bioactivity.


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External links:

Overview (USEPA)

A Guide for Corrective Action Plan Reviewers (USEPA)

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