BIO-BARRIER FORMATION BY BACTERIUM/FUNGUS INJECTION INTO SOILS
If microorganisms are injected into porous medium such as soils along with appropriate substrate and nutrients, soil pore size and shape are changed from the initial condition as a result of biofilm formation, which make hydraulic conductivity reduced. In this research, reduction of hydraulic conductivity was measured after specific bacterium or fungus was inoculated into soil pore. Hydraulic conductivity decreased to 1∼10 % of the initial permeability and maintained constant while substrate was provided. Under the adverse conditions such as no substrate, chemical solution permeation, and freeze-thaw cycles, hydraulic conductivity increased 30∼50%. Hydraulic conductivity decrease of fungus-soil mixture was faster than that of bacterium-soil mixture. Fungus-soil mixture, however, was more sensitive to the adverse conditions.
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Document Type: Research Article
Publication date: 2001-01-01
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