| 摘要 |
PROBLEM TO BE SOLVED: To purify underground soil polluted with organic chlorine compounds like trichloroethylene and tetrachloroethylene by eliminating, the organic chlorine compounds as pollutants. SOLUTION: Underground water pumped up from the underground soil through one well 2 is boiled to be vaporized by feeding the water to a vaporizer 6 kept in a pressure reduced below the atmospheric pressure, or the water is deaerated by feeding the water to a deaerator 14, dissolving air or other gas, or without dissolving gas. Then, treated water from the vaporizer 6 or from the deaerator 14 is added with a nutrient of anaerobic microorganisms through a pipe 10, and returned to the underground soil at a place distant from the pumped up place of the water through another well 3. COPYRIGHT: (C)2005,JPO&NCIPI
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