| 摘要 |
PROBLEM TO BE SOLVED: To treat soil contaminated with a VOC at a purification yard, highly efficiently, in a short time, and at a low cost. SOLUTION: The soil contaminated with the VOC is passed through a treating apparatus provided with the introduction part and the derivation part of out door air and also mounted with a plurality of conveyers by the plurality of conveyers while carrying out aeration, is repeatedly dried by air, is micronized to less than 0.1 to 4 cm or smaller, and is brought in contact with a large amount of air to accelerate gasification of the VOC contained in the soil contaminated with the VOC and reduce a VOC concentration of less than a targeted value or lower. Hot air is brought in contact with that as a counter current to a passage direction of the soil contaminated with the VOC. As pre-treatment, the soil contaminated with the VOC is passed through a volatile acceleration area constituted of a vibration screen having a passage aperture of 0.1 cm to 4 cm and an air blower, and falls while micronizing the soil contaminated with the VOC, or is subjected to reduction treatment of a moisture ratio or heat treatment at 40 to 100°C. COPYRIGHT: (C)2005,JPO&NCIPI
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