| 摘要 |
PROBLEM TO BE SOLVED: To efficiently restore a contamination substance such as oils and an organic chlorine based compound existing in a clay layer at an original position without requiring a large number of facilities or the like. SOLUTION: In the contamination cleaning method for the clay layer, a division wall 5 is installed to a water-permeable layer 2 positioned at a lower part of the upper clay layer 1 contaminated with the contamination substance and a surfactant and a nutrition source of a microorganism are poured to the upper clay layer 1 in the division wall 5 at a high pressure to remove and elute the contamination substance from soil particles of the upper clay layer 1. Further, the removed and eluted contamination substance and the nutrition source are moved to the water-permeable layer 2 to promote microorganism decomposition. COPYRIGHT: (C)2007,JPO&INPIT
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