| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for effectively pretreating an excavated polluted soil containing PCB by flexibly corresponding to the pollution condition to obtain a pretreated soil conforming to various accession standards relating to a device used for the method. <P>SOLUTION: The pretreatment method includes: a primary separation step (S100) of separating and removing large-size contaminants having the major axis of 100 mm or more from the excavated polluted soil; a drying step (S101) of drying the polluted soil from which the large-size contaminants are removed in the primary separation step; a secondary separation step (S102) of separating and removing middle-size contaminants having the major axis of at least 40 mm from the polluted soil passed through the drying step; a tertiary separation step (S103) of removing small-size contaminants such as waste materials of harmful matter-containing components, having the major axis of at least 5 mm from the polluted soil separated through the secondary drying step; and a conditioning sand-blending step (S105) of blending the soil passed through the sieve in the tertiary separation step and a conditioning sand 10 to control the PCB concentration to the level of the accession standard value or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
