Patent ID: 6776910
Filing Date: 2004-08-17
Classification: B09C,E21B,Y10S

Abstract:
A method for in situ remediation of an aquifer having a treatment zone through which passes water contaminated with at least one chemical contaminant which method comprises:a) injecting, by at least two conduits, an oxygen-containing gas at a pressure of at least 5 psig above the hydrostatic pressure at injection points at a frequency of from about once a week to about ten times a day; and b) delivering to the treatment zone a microbial culture capable of degrading at least one chemical contaminant, wherein the volume of oxygen-containing gas injected each time at each injection point contains from about 1 to 100 times of minimum average volume (Vmin) in cubic feet of total oxygen, measured at ambient temperature and ambient pressure. Wherein Vmin can be calculated as: Vmin=0.1Ã—AÃ—BÃ—PÃ·N Wherein A=treated area (square ft) B=treatment thickness (ft) P=porosity N=number of injection points.