Bio aerator
AssigneeShell Oil Company
InventorsWilliam L. Schaefer, Leroy J. Bealer, Jr.
Life of this patent
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Abstract
In typical hydrocarbon-contaminated ground water, the level of dissolved oxygen is low due to the high biological oxygen demand. The present invention increases dissolved oxygen levels in the ground water thereby increasing biological activity. The increased biological activity means that more of the dissolved hydrocarbons will be consumed at a greater rate. The instant process and apparatus for remediating dissolved hydrocarbon in ground water involves drawing ambient air down through a tubing and aeration stone into ground water by the vacuum created by a soil vapor extraction (SVE) system thereby increasing the amount of dissolved oxygen in the SVE well and in the ground water resulting in enhanced biodegradation by aerobic microbes.
Claims5
An apparatus for treating contaminated ground water comprising:
- tubing means adapted to be suspended in a well such that, when suspended in a well, the upper end of said tubing is above ground and is open to the atmosphere, and the lower end of said tubing extends into said ground water;
- said tubing means having a coiled portion, which serves as a spring, which coiled portion, when said tubing is suspended in a well, does not extend to said ground water;
- a further extension of said tubing means continuing below said coiled portion, said further extension terminating in said ground water;
- float means adapted to be slidingly attached to said tubing means below said coiled portion;
- aeration means attached to the lower end of said tubing means;
- and
- weight means fixedly attached to the lower end of said tubing means below said aeration means.
Dependencies are inferred from the claim text.