C3 Technology - Refrigerated Condensation for Vapor Recovery and Off-Gas Treatment

Process Description | Power Requirements | Published Papers | GEO Brochure

The C3 Technology developed by G.E.O. is a combination of compression, cooling, and condensation processes with a proprietary regenerative adsorption technology that efficiently recovers volatile organic compounds (VOCs) from the off-gas vapor stream of soil vapor extraction (SVE) or dual phase extraction (DPE) systems. The chemical is recovered as a non-aqueous phase liquid (NAPL) that is temporarily containerized in appropriate vessels for recycling or proper disposal. Generally, greater than 99.98% of the VOCs are recovered from the vapor stream. Dependent upon the contaminant and State or local agency, final effluent may be polished with granular activated carbon (GAC).

New or custom modified systems can be manufactured in 8-12 weeks.

GEO Inc.

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Soil Vapor Extraction Process Flow Diagram

Process Flow Diagram

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xxxProcess Description
  • Soil gas is drawn into the system and delivered to the air compressor by a 5- to 10-horsepower positive displacement blower.
  • Entrained liquids from extraction wells are separated at the water knockout tank. Separated liquids are securely drummed and transported off-site or captured with GAC and discharged to the sewer or storm drain in accordance with all local and state regulatory requirements.
  • Process air is compressed to approximately 150 pound per square inch (psi) by the compressor.
  • Water vapor is removed from the process stream at the air-to-air heat exchangers as it is cooled to ambient temperature.
  • The vapor stream is further cooled to approximately -40° F in the refrigerated heat exchangers, where the chemical constituents are condensed and separated from the vapor stream.
  • The vapor stream is then sent to the regenerative adsorber, which removes any fugitive VOCs and directs it back to the inlet stream.

System effluent vapor stream [<10 parts per million by volume (PPMV)] polish utilizing granular activated carbon (GAC) prior to discharge to atmosphere may be required in some regions; negligible GAC consumption.

GEO currently manufactures standard units of 100, 200, 300, 500 and 1,000 SCFM flow rate capacity.  For larger SCFM requirements, G.E.O. provides custom systems to meet your needs.

xxxPower requirements


Flow Rate
100 SCFM
200 SCFM
300 SCFM
500 SCFM
Power Requirements

480 VAC 3-phase 100AMP and
240 VAC 70 AMP

480 VAC 3-phase 150AMP and
240 VAC 70 AMP

480 VAC 3-phase 200AMP and
208/240 VAC 70 AMP

480 VAC 3-phase 300AMP and
208/240 VAC 70 AMP

Power Usage
45 KVA
75 KVA
Foot Print
20 x 30 ft
25 x 30 ft
30 x 30 ft
35 x 50 ft
Carbon Polish
Two 200lb drums
Two 400lb drums
Three 400lb drums
Two 1,000lb vessels

xxxPublished Papers
  • Case Study HA - Sustainable Soil Remediation by Refrigerated Condensation at Sites with "High Concentration" Recalcitrant Compounds and NAPL: Two Case studies - Wiley Periodicals, Inc, 2008


Process Description | Power Requirements | Published Papers | GEO Brochure

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