Garbage Stabilization Method
The Expressway passes through the filled ground in Kyongseo-dong, Inchon, so that the ground had to be removed. Because other filled-up grounds to take excavated waste was not available, it was decided to move them to the north of the existing ground. However, the bad smell or poisonous gas coming out during the excavation might cause environmental disaster and residents' complaint.

The stabilization method was needed to prevent the bad odor. After reviewing alternative methods, the Smell-Well method developed by IUT was selected. The lance which act as the impregnation well and the suction well was installed on the filled ground. The space between the lance was 5 to 6M. The fresh air filtered using bio-filters and aerobic bacteria were circulated through the lances and removed the bad odor and poisonous gas. The method was successfully applied and there was no complaints of the odor.