CLEANING METHOD FOR HARDLY-GAS/WATER-PERMEABLE CONTAMINATED SOIL AND SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a cleaning method for hardly-gas/water-permeable contaminated soil capable of certainly and efficiently recovering the contaminated substance existing in a hardly gas/water permeation layer, and a system. SOLUTION: The cleaning system 1 for the hardly water permeable contaminated soil is provided with a high pressure air pressure-introduction mechanism 5 for intermittently feeding high pressure air to a contaminated area 4 contaminated with the contaminant 3 such as oil and dioxins or volatile organic chlorine compounds of an unsaturated hardly gas/water permeation layer 2 existing above underground water level; and a gas treatment facility 13 for sucking the contaminant 3 with air after the air intermittently introduced is raised through an unsaturated gas permeation layer 7 while the air carries the contaminant 3. The high pressure air pressure-introduction mechanism 5 intermittently introduces the high pressure air from an air compressor 12 to the contaminated area 4 through a pressure-introduction pipe 9 and can impart vibration to soil particles in the contaminated area. COPYRIGHT: (C)2005,JPO&NCIPI