An object of the present invention is to provide a decomposing bacteria fixing carrier carrying 1,4-dioxane-decomposing bacteria, and a biodegradation treatment method and a biodegradation treatment apparatus for organic compounds using the support. As a means of solving the above problems, the present invention provides a porous carrier, a decomposing bacteria fixing carrier having 1,4-dioxane-decomposing bacteria supported on the porous carrier, and a biodegradation treatment method and biodegradation treatment apparatus for organic compounds using the support Provides.
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