| 摘要 |
PROBLEM TO BE SOLVED: To provide an in situ purification method of contaminated soil and groundwater which can purify contaminated soil and groundwater by surely and more efficiently decomposing volatile organic compounds using microorganisms. SOLUTION: A suction well 1 is arranged in a contaminated region R contaminated with the volatile organic compounds, and a first injection well 2 and a second injection well 3 are arranged respectively in one contaminated region R1 and the other contaminated region R2 so as to put the suction well 1 between them. By first circulation S1 of groundwater W generated by supplying the groundwater W from the first injection well 2, making the groundwater flow through the contaminated region R1, and sucking it by the suction well 1, an anaerobic decomposition region P1 where the volatile organic compounds are decomposed by activated anaerobic microorganisms is formed in the contaminated region R1. By second circulation S2 of the groundwater W generated by supplying the groundwater W from the second injection well 3, making the groundwater flow through the contaminated region R2, and sucking it by the suction well 1, an aerobic decomposition region P2 where the volatile organic compounds are decomposed by activated aerobic microorganisms is formed in the contaminated region R2. COPYRIGHT: (C)2008,JPO&INPIT
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