What does an air sparger do?
Air sparging is the process of injecting air directly into groundwater. Air sparging remediates groundwater by volatilizing contaminants and enhancing biodegradation. As the contaminants move into the soil, a soil vapor extraction system is usually used to remove vapors.
What is the difference between Biosparging and Bioventing?
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 a sparging system?
Figure 4-32: Typical Air Sparging System Air sparging is an in situ technology in which air is injected through a contaminated aquifer. Injected air traverses horizontally and vertically in channels through the soil column, creating an underground stripper that removes contaminants by volatilization.
Is air sparging expensive?
Air sparging can be somewhat less expensive, work more quickly, deal with contamination in both soil and groundwater, and obviate the need for a DEP water discharge permit because no water need be pumped out of the ground.
Where is bioventing used?
Bioventing is most often used at sites with mid-weight petroleum products (i.e., diesel fuel and jet fuel), because lighter products (i.e., gasoline) tend to volatilize readily and can be removed more rapidly using SVE.
What is Biopile treatment?
Biopiling is a full-scale technology in which excavated soils are piled and typically constructed in a treatment area that consists of a leachate collection and aeration system. It is commonly applied to reduce concentrations of petroleum components in soils through utilising the process of biodegradation.
What is an air sparge well?
Air sparging (AS) is an in situ remedial technology that reduces concentrations of volatile constituents in petroleum products that are adsorbed to soils and dissolved in groundwater. Air sparging is most often used together with soil vapor extraction (SVE), but it can also be used with other remedial technologies.
Is air sparging in situ?
Air sparging, also known as in situ air stripping and in situ volatilization is an in situ remediation technique, used for the treatment of saturated soils and groundwater contaminated by volatile organic compounds (VOCs) like petroleum hydrocarbons which is a widespread problem for the ground water and soil health.
Why is pump and treat good?
Pump and treat is a common method for cleaning up contaminated groundwater containing chemicals such as industrial solvents, metals and fuel oil. This pumping helps prevent contaminants from reaching drinking water wells, wetlands, streams and other natural resources.
What is Airtrip process?
Air stripping is the process of moving air through contaminated groundwater or surface water in an above-ground treatment system. Air stripping removes chemicals called “volatile organic compounds” or “VOCs.” VOCs are chemicals that easily evaporate, which means they can change from a liquid to a vapor (a gas).