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In situ thermal desorption
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In situ thermal desorption : ウィキペディア英語版
In situ thermal desorption
In Situ Thermal Desorption (ISTD) is an intensive thermally enhanced environmental remediation technology that uses thermal conductive heating (TCH) elements to directly transfer heat to environmental media. The ISTD/TCH process can be applied at low (<100 °C), moderate (~100 °C) and higher (>100 °C) temperature levels to accomplish the remediation of a wide variety of contaminants, both above and below the water table. ISTD/TCH is the only major in situ thermal remediation (ISTR) technology capable of achieving subsurface target treatment temperatures above the boiling point of water and is effective at virtually any depth in almost any media. TCH works in tight soils, clay layers, and soils with wide heterogeneity in permeability or moisture content that are impacted by a broad range of volatile and semi-volatile organic contaminants.
== History ==
ISTD using TCH was developed by Shell Oil Co. in the late 1980s and grew out of research and development for enhanced oil recovery. During the mid-1990s Shell Oil Company commercialized ISTD with an investment of over $30 million. In 2000 TerraTherm, Inc. secured exclusive licenses for the use of electric heater wells for ISTD. In 2012 Good Earthkeeping Organization (GEO), Inc. (GEO Inc.) entered into a license agreement with TPS TECH SA to manufacture and operate gas powered heater wells for ISTD. GEO Inc. has since submitted multiple patents for the manufacturing and use of Gas Thermal Remediation (GTR) heater units for the use in ISTD/(TCH) applications world wide.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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