Method and apparatus for installing and removing biologically st

Details Method and apparatus for installing and removing biologically st Method and apparatus for installing and removing biologically st

1995-01-18

1996-07-02

Upton, Christopher

Liquid purification or separation

Processes

Treatment by living organism

210747, 210901, 435262, 166310, 405128, B09C 110

Patent

active

055318959

ABSTRACT:
The environment in a porous area, such as in an aquifer in controlled to promote the growth of indigenous microorganisms as well as introduced microorganisms. Nutrients and other growth-promoting chemicals are added to cause the organisms to grow and produce a biofilm that retards fluid movement. Tubes are inserted into the target area, and fluids containing nutrients and other chemical are circulated through the porous area, the paths of circulation defining the areas of growth of microorganisms to produce a barrier, referred to as a biowall. After the biowall has served its purpose, it can be dispersed by injecting chemicals to stop growth and/or to kill the microorganisms.

REFERENCES:
patent: 3846290 (1974-11-01), Raymond
patent: 4401569 (1983-08-01), Jhaveri et al.
patent: 4755304 (1988-07-01), Hallberg et al.
patent: 4992174 (1991-02-01), Caplan et al.
patent: 5006250 (1991-04-01), Roberts et al.
patent: 5277815 (1994-01-01), Beeman
patent: 5384048 (1995-01-01), Hazen et al.

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