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NOVEL DELIVERING OF NUTRIENTS AND OXYGEN TO AID IN SITU BIORECLAMATION
Citation:
Davis-Hoover, W. AND e. al. NOVEL DELIVERING OF NUTRIENTS AND OXYGEN TO AID IN SITU BIORECLAMATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-90/233.
Description:
A serious problem in the implementation of in situ bioreclamation is the delivery of nutrients and oxygen to soil of low permeability. his problem commonly requires contaminated soil to be excavated for bioreclamation, resulting in increased exposure to toxic materials, liability and cost. e demonstrated that it is feasible to create hydraulic fractures at shallow depths (several m) in silty clay till. ractures created during a recent field test were flat-lying and roughly equant in plan with a maximum dimension of 8 m. oarse sand was pumped into the fractures to hold them open. he sand was an average of 1.1 cm in maximum thickness. s many as four fractures were created from the same borehole, stacked at vertical spacing of 15 or 30 cm. his technique will be used to deliver slow-releasing granules of nutrients and encapsulated oxygen compounds in an effort to enhance in situ bioreclamation of contaminated soil.