| abstract |
[PROBLEMS] To continuously react with a polyvalent metal for a long period of time, to precipitate an insoluble salt efficiently, to easily penetrate into the ground, and to be hard to lose water permeability in the ground even when solidified. Provide a method for treating soil or building enclosures that do not affect the environment. An insoluble salt is formed by, for example, injecting a polyvalent metal compound and a composition containing a microbial nutrient source and / or a microorganism as an active ingredient into the soil. From the low pressure carbon dioxide gas container 8-1 to the solenoid valve 10-1, the pressure reducing valve 11-1, the carbon dioxide gas blowing nozzle 15, the polyvalent metal compound aqueous solution (liquid A) storage tank 1-1, and other composition aqueous solutions (liquid B) Carbon dioxide gas is injected into the storage tank 1-2, or the polyvalent metal compound aqueous solution and carbon dioxide gas are mixed by the gas-liquid mixing device 2, and the polyvalent metal compound aqueous solution that has absorbed the carbon dioxide gas is injected through the liquid supply line 5 Pump to 7. Further, carbon dioxide gas is injected from the high-pressure carbon dioxide container 8-2 into the injection pipe 7 or the ground 6 through the electromagnetic valve 10-2, the pressure reducing valve 11-2, and the carbon dioxide blowing nozzle 13. [Selection] Figure 1 |