What is bioventing and Biosparging?

Bioventing is the aeration of the unsaturated vadose zone to stimulate aerobic biodegradation. Biosparging is the injection of air into the groundwater to provide oxygen for groundwater remediation.

What is meant by bioventing?

Bioventing is a technology that stimulates the natural in situ biodegradation of any aerobically degradable compounds in soil by providing oxygen to existing soil microorganisms.

What is meant by bioremediation?

Bioremediation is a branch of biotechnology that employs the use of living organisms, like microbes and bacteria, in the removal of contaminants, pollutants, and toxins from soil, water, and other environments. Bioremediation is used to clean up oil spills or contaminated groundwater.

What is bioremediation give an example?

Bioremediation companies that specialize in soil and groundwater use microbes that feed on the hazardous substances for energy, which results in the breakdown of the targeted contaminant. Examples include junkyards, industrial spills, land development, fertilizer use, and more.

What do you need to know about biosparging?

1. Is an i n-situ remediation technology that uses indigenous microorganisms to biodegrade organic constituents in the saturated zone. In biosparging, air (or oxygen) and nutrients (if needed) are injected into the saturated zone to increase the biological activity of the indigenous microorganisms.

How is biosparging used in soil vapor extraction?

When volatile constituents are present, biosparging is often combined with soil vapor extraction or bioventing (collectively referred to as vapor extraction in this chapter), and can also be used with other remedial technologies.

Why is intrinsic permeability so important to biosparging?

Intrinsic Permeability Intrinsic permeability is a measure of the ability of soil to transmit fluids and is the single most important characteristic of the soil in determining the effectiveness of biosparging because it controls how well oxygen can be delivered to the subsurface microorganisms.

How does air or gas injection affect biosparging?

Air or gas injection enhances clogging of injection wells and soil pores when high ferrous iron and/or dissolved manganese concentrations are present. By design, bioremediation will have large effects on parameters like oxidation-reduction potential, pH and total organic carbon.