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Air sparging is a commonly deployed environmental remediation technology by which pressurized air is injected into a contaminated groundwater zone to remove harmful volatile contaminants. XDD offers a new and innovative Navy-developed technology called Adjustable Depth Air Sparging (ADAS) that is applied within a single air sparge well with infinite adjustability.
The ADAS system is simple to use and can be employed with conventional air sparging equipment and methods to help increase overall air distribution, lower project costs and improve cleanup performance.
ADAS is a sparging system that allows the user to precisely and repeatedly adjust the depth of air injection without the added expense of having to install new air sparge wells. The ADAS system uses an inflatable flow-through packer that can be raised and lowered within the screened section of a sparging well, and is designed to seal off the interior of the well so that injection air flowing out from the bottom of the packer does not travel back up the well interior. The same pressurized air supplied to inject or sparge into the groundwater is also used to inflate the flow-through packer. A mounted pressure regulator on the packer provides back-pressure to inflate the packer. Once airflow stops, the packer deflates, allowing the operator to readjust the packer to inject air at a new depth.
The primary advantage of selecting the ADAS system over conventional wells is that optimization of the system to maximize stripping of the VOCs and improve distribution of oxygen for biodegradation of hydrocarbons is easy to perform and can result in more effective treatment and in shorter remediation timeframes and costs. ADAS is a unique improvement in the field of air sparging technology and has the potential to reduce cleanup costs by an estimated 15 to 30%.
For more information on air sparging or the ADAS system, please contact Mike Marley at (800) 486-3575 or Marley@xdd-llc.com.
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