Author(s): T. Theurer
Linked Author(s):
Keywords: Bandoned waste disposal site; Chlorinated hydrocarbons; In-situ-remediation; Steam injection; Thermal enhancement
Abstract: Cold soil vapour extraction is a common technique for remediating volatile organic compounds from the unsaturated subsurface. Limitations in efficiency can be overcome by using thermal enhancement, e. g. steam as a fluid heat transport medium to speed up the process (Sleep and Ma, 1997). At the Muhlacker fieldsite in southwestern Germany the remediation of a TCE contamination in the unsaturated zone under a former landfill is in progress. Steam injection with an extensive monitoring program is being used and yielding good results. However, problems arise from low permeability of the subsurface. Condensed water will be held by capillary forces which results in the decrease of the permeability. After a break in remediation efforts, measures were taken to insure better operating and efficiency of the plant.
Year: 2001