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Soil Vapour Extraction (SVE) Systems
Soil vapour extraction remediation systems.

Remediation Applications
Soil vapour extraction systems can be used for a number of potential applications including:
  • Volatilisation of residual NAPL within the soil matrix;
  • Enhanced biodegradation of organics within the soil matrix by oxygenation;
  • Vacuum Enhanced product recovery;
  • Recovery of vapours from air sparging and/or steam injection
Quite frequently an SVE system will also be fitted with a compressor for combined LNAPL skimming or Total Fluids Abstraction, or for Air Sparging.
Key Benefits
  • A relatively low cost remedial technology even for Zone 2 gases (ATEX Cat.3)
  • Highly versatile for volatilisation and enhanced biodegradation;
  • Suitable for combination with a range of other technologies.
  • Extremely robust and reliable design
  • Frequently available “off the shelf”
Operation
A typical soil vapour extraction (SVE) system will be connected to a number of remediation wells via individual “spur” pipes to a single large header pipe which in turn will be connected to the System Inlet separator.  A vacuum is applied to the inlet separator by the SVE blower(s) and thus soil vapour is drawn from the wells through the separator and the blower and discharged through a vapour treatment plant such as Activated Carbon,  Catalytic Oxidiser or Biofilter.  A dilution valve is fitted to facilitate adjustment of  the concentration mix passing through the SVE system.  This dilution valve may be manual or, if the system is equipped with an in-line LEL detection may be controlled automatically by the PLC to maintain an optimum concentration.
Specifications
Cornelsen can build a system to match virtually any required design.  A typical off-the shelf system available for rapid mobilisation and hire is summarised below:
  • 10’ Steel Shipping Container with insulation, electric light and ventilation
  • Max. Air Flow:  550m3/hr
  • Max. Vacuum: -250mbar gauge (750mbar abs.)
  • ATEX Cat. 3 with in-line infra-red LEL detection system.
  • 200 litre moisture and particulate separator
  • 440 litre/min compressor for Air Sparging, or Total Fluids pumping or LNAPL Skimming
  • Control Panel with PLC and telemetry with SMS alarm text messages and remote dial in access.
Tech Tip: Cornelsen SVE and MPE systems are fitted with the more expensive infra-red LEL detection systems as these are considerably more reliable and require less frequent calibration than the lower cost pellistor type.


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