[A-GE28] Energy-Environment-Water Nexus and Sustainable Development

[AGE28-01] Development of Bioremediation Technology for Soil Contamination with Impermeable Layer - Contribution of Geo-environmental Research -

★Invited Papers

*Takeshi Komai¹, Uesawa Susumu², Zhang Ming³ (1.Tohoku University, 2.Chemical Grout, 3.AIST)

Keywords:geo-environment, soil contamination, transport phenomenon

Bioremediation using microbial degradation is important as a low-cost, environmentally friendly remediation technology. However, its application to impermeable ground is not easy, and the process of mass transfer of accelerators, hydrogen, and other substances must be considered in order to efficiently apply reagents, but this process is not well understood. In this study, we examined the basic performance of each of the following methods that can be used in the actual field: planar diffusion using a permeable layer immediately above an impermeable layer or a slit surface drilled by a water jet, hollow cylindrical diffusion using a borehole, and hollow spherical diffusion using the bottom of a borehole. The basic performance of each diffusion method was examined. As a result, it was inferred that the planar diffusion method using a slit surface opened by a water jet in an impermeable formation can inject reagents most efficiently.
As a basis for such low-cost and environmentally friendly biotechnologies, the authors evaluated the diffusion characteristics of substances such as hydrogen and pollutants in the geosphere and the permeability characteristics of impermeable formations, and developed a new remediation technology combining biotechnologies and waterjet technology. In this context, the scientific contribution of Dr. Zhang Ming, one of the authors, is extremely significant. We would like to express our deepest condolences to Dr. Zhang Ming and thank him for his contribution to our future research by presenting his achievements and research results.