Skip common site navigation and headers
United States Environmental Protection Agency
National Risk Management Research Laboratory
Begin Hierarchical Links EPA Home > Research & Development > National Risk Management Research Laboratory > CF Systems Organics Extraction Process, New Bedford Harbor, Massachusetts End Hierarchical Links

CF Systems Organics Extraction Process
New Bedford Harbor, Massachusetts
Applications Analysis Report

This document is available in the Adobe Acrobat PDF Format.

Click here for information about Portable Document File (PDF) Formats.

or

Click here to directly download the Acrobat Reader.

(To view the PDF, it is recommended that you use the latest version of Acrobat Reader.)

 


CF Systems Organics Extraction Process, New Bedford Harbor, Massachusetts (1,093K)


U.S. EPA Superfund Innovative Technology Evaluation (SITE) Program
Liquified Gas Solvent Extraction (LG-SX) Technology
CF Systems Corporation

ABSTRACT

CF Systems’ LG-SX technology uses liquified gases to extract organic contaminants from soils, sludges, sediments, and wastewaters. The low viscosities, densities, and surface tensions of these gases, when liquified under pressure, result in higher rates of extraction compared to conventional liquid solvents. The low densities accelerate gravity separation and the high volatilities minimize the time and energy required to vaporize and recycle the solvent. Liquified propane is typically used in a batch extractor-decantor to treat soils, sediments, and sludges. Liquified carbon dioxide is used in a continuous-trayed tower design for wastewaters and low-solids wastes. This technology is applicable to volatile and semivolatile contaminants. A pilot-scale unit was demonstrated with polychlorinated biphenyl-contaminated sediments from the New Bedford Harbor Superfund site (Massachusetts) in September 1988. PCB concentrations ranged from 300 ppm to 2,500 ppm. Extraction efficiencies were 90 to 98 percent for sediments with between 360 and 2,575 ppm. A treatment efficiency of 99.9 percent was achieved for volatile and semivolatile organics in aqueous and semi-solid wastes. Operating problems were encountered, but later corrected in a full-scale application at Star Enterprise in Port Arthur, Texas.


 Back to SITE Home Page

Posted June 22, 1999

 

Office of Research & Development | National Risk Management Research Laboratory

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us