Author(s): Martin Emmert; Rainer Helmig; Werner Bachle
Linked Author(s): Rainer Helmig
Keywords: No Keywords
Abstract: With the aim of developing remediation technologies, the experimental INTRODUCTION VEGAS research facility was built at the Institut fur Wasserbau at the University of Stuttgart/Germany. The objective of VEGAS is to test and optimize existing techniques and to develop new approaches for in-situ remediation of contaminated aquifers and soils. This includes further development of finite element and finite volume techniques for simulating multiphase fluid and heat flow. One of the ongoing studies in VEGAS is called thermally enhanced soil vapor extraction(TUBA) and concerns soil venting for the remediation of organic contaminants in the vadose zone. For remediation of low volatile NAPLs however this method is inefficient and also fails in case of NAPL contaminated clay lenses because of air flowing around the lens. Concurrent injection of heat improves the effectiveness of soil venting by increasing NAPL vapor pressure and viscosity and decreasing capillary forces.
Year: 1997