Toxic cleanup using bioventing and sparging

No Thumbnail
Toxic cleanup using bioventing and sparging
No Thumbnail
Google Maps Google Maps Birds Eye Birds Eye Yahoo Maps Yahoo Maps
map #34911
View in Google Earth
By kjfitz @ 2007-07-05 10:13:35
At former Mather Air Force Base.

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. This injected air helps to flush (bubble) the contaminants up into the unsaturated zone where a vapor extraction system is usually implemented in conjunction with air sparging to remove the generated vapor phase contamination. This technology is designed to operate at high flow rates to maintain increased contact between ground water and soil and strip more ground water by sparging. [amiadini.com]

Bioventing is an in situ remediation technology that uses indigenous microorganisms to biodegrade organic constituents adsorbed to soils in the unsaturated zone. Soils in the capillary fringe and the saturated zone are not affected. In bioventing, the activity of the indigenous bacteria is enhanced by inducing air (or oxygen) flow into the unsaturated zone (using extraction or injection wells) and, if necessary, by adding nutrients.

When extraction wells are used for bioventing, the process is similar to soil vapor extraction (SVE). However, while SVE removes constituents primarily through volatilization, bioventing systems promote biodegradation of constituents and minimize volatilization (generally by using lower air flow rates than for SVE). In practice, some degree of volatilization and biodegradation occurs when either SVE or bioventing is used. [EPA]
530 views
Views by date
Rate as 1Rate as 2Rate as 3Rate as 4Rate as 5Rate as 6Rate as 7Rate as 8Rate as 9Rate as 104.0 (3 votes)

Categories

Comments

Feed Feed Policies

Please log in if you don't want to post anonymously (anonymous users cannot post links)

Please enable images and enter code to post
Reload
Pics: 1
Toxic cleanup using bioventing and sparging
Nearby maps
Share:
Update Thumbnails: