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unilogo Universität Stuttgart
Institute of Hydraulic Engineering

Research: VEGAS - Research Facility for Subsurface Remediation

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Thermally Enhanced Soil Vapor Extraction
Project manager:Prof. Dr. h.c. Dr.-Ing. E.h. Helmut Kobus, Ph.D.
Deputy:Dr.-Ing. Hans-Peter Koschitzky, AD
Research assistants:Dr.-Ing. Arne Färber
Dr.-Ing. Christoph Betz
Dr.-Ing. Reinhard Schmidt
Duration:1.4.1997 - 30.6.1999
Funding:Projekt Wasser Abfall Boden (PWAB)
Comments:

This project is part of the research area:
In-Situ Remediation Technologies

Publications: Link

Abstract:

Using the common remediation technique SVE (soil vapour extraction) for the cleanup of contaminated soil mass transfer limitations often lead to unsatisfactory results even after years of operation. Injection of steam in addition to conventional SVE can accelerate and improve the remediation process due to significant changes in contaminant properties with increasing subsurface temperature. Using the technique of combined steam-air injection for the cleanup process of unsaturated soils, the enhancement of soil vapor extraction by steam can be used by avoiding the disadvantage of uncontrolled contaminant displacement. Laboratory experiments on different scales (bench to technical scale) have been conducted to investigate the dominating process for heat transfer in the three phase system and to develop an innovative remediation technology.