multi phase extraction Articles

  • Multi-phase extraction system (explosion proof) with LNAPL skimming

    This project has entailed the installation of 29 recovery wells within a large building connected to the remediation system via 1 km of pipework suspended from the ceiling. Recovery wells are installed within subsurface well chambers and short trenches provide ducting for the pipeworks.The remediation system includes Xitech ADJ 1000 smart skimmers for the recovery of floating white spirits (where ...


  • Enhanced Removal of Separate Phase Viscous Fuel by Electrical Resistance Heating and multi phase Extraction

    Abstract A floating hydrocarbon plume at a manufacturing facility in Georgia was remediated using electrical resistance heating (ERH) and multi-phase extraction. The hydrocarbon was a specialty fuel similar to kerosene or diesel fuel. Initially, hydrocarbon covered an area of 4900 ft2 (500 m2) and was up to l0 ft (3 m) thick, with most wells containing 1-3 ft (0.5-1 m) of hydrocarbon. ...


    By TRS Group, Inc.

  • Off-Gas Treatment Technologies for Soil Vapor Extraction Systems: State of the Practice

    Untitled Document EXECUTIVE SUMMARY This document provides state-of-the-practice information on off-gas treatment technologies for soil vapor extraction ...

  • Analysis of Multi-Pesticide Residues in Vegetables, Food, and Fruits by SPE/GC-MS

    Cleanup of matrices is the first, the most important, and the most critical step for both broad-spectrum screening and accurate determination of pesticides and their metabolites in vegetables,meats, drinks and fruits. In most cases, solid phase extraction (SPE) methods are used to clean up the extracts before the GC-MS analysis. The ideal SPE material(s) should remove the greatest number of food ...


    By Sigma-Aldrich Co., LLC

  • In-situ Thermal Remediation Under an Apartment Building

    This paper presents the implementation and results of ET-DSP, an in-situ electrical soil heating technology, in combination with high vacuum dual phase extraction, to achieve the removal of vapour pressure sensitive BTEX compounds from under an occupied residential apartment building. Operating within several engineering, environmental, and safety constraints, a design was developed in order to ...


    By McMillan-McGee Corp.

  • The CEA/BARC collaboration on the use of nuclear reactors for desalination

    This paper presents the collaboration between the French Atomic Energy Commission (Commissariat a l'Energie Atomique, CEA) and the Indian Bhabha Atomic Research Centre (BARC) on the use of nuclear reactors for desalination. The joint R&D effort aims at developing optimised nuclear desalination systems, producing large amounts of desalted water at the lowest cost and in a sustainable manner. It ...


    By Inderscience Publishers

  • Electrical heating for the removal of recalcitrant organic compounds

    ABSTRACT This paper presents a remediation technology that combines electrical heating of the soil with extraction to achieve removal of vapour pressure sensitive compounds, such as chlorinated solvents, volatile and semi-volatile organic compounds, and heavier hydrocarbons. This technology is commercially known as the Electro-Thermal Dynamic Stripping Process (ET-DSP). As well the ...


    By McMillan-McGee Corp.

  • Redeveloping Brownfields case study

    Challenge: A property owner sought the services of Antea Group to assist in the Brownfield redevelopment of a 17-acre former railroad depot located in a high-profile urban area. The extent and magnitude of known soil and groundwater impacts combined with the time required to remediate the site was a major obstacle to the successful sale and subsequent development of the ...


    By Antea Group - USA

  • Achieving exemplary compliance case study

    Challenge: A major integrated oil company retained the services of Antea Group to manage environmental liability at a bulk storage and distribution facility that supplies gasoline, diesel fuel and other refined petroleum product to Minnesota, Iowa and Wisconsin.  The property presented a series of unique challenges including multiple LNAPL plumes, ...


    By Antea Group - USA

  • Electrical Resistance Heating: a Hot New Approach to Soil and Groundwater Remediation

    Electrical Resistance Heating (ERH) is an aggressive remediation technology that can quickly reduce the mass of volatile organic compounds (VOCs) in soil and groundwater by over 99%. The process is often used to clean sites where other technologies have had limited success. Larger ERH sites are cleaned within 6 to 12 months and smaller sites can be cleaned in half that time or ...


    By TRS Group, Inc.

  • Environmental Liability Management for a Large American University

    Challenge A large American university recently acquired a two-hundred acre hospital property for the purpose of future developments. One fifth of the property was impacted by chlorinated solvents and petroleum. Antea Group was appointed to assume the liability, return the land to residential use, and abate the migration of contaminants with minimal disruption to the campus or the ...


    By Antea Group - USA

  • Raynesway resource park - Case Study

    The Raynesway Resource Park is a 35 hectare site bounded on three sides by the River Derwent. The southern half of a former chemicals plant, soils and groundwaters were impacted by chlorinated solvents, acid tars, hydrocarbons and ammoniacal sludges. Celtic designed a sophisticated groundwater treatment system, integrating air sparging, multi-phase extraction and chemical oxidation to address ...


    By CELTIC Technologies Ltd

  • Combining HVME and Enhanced Bioremediation for Gasoline Contamination in Groundwater

    A leaking underground storage tank at a commercial petroleum retail site located in Haskell, Texas resulted in soil and groundwater petroleum hydrocarbon contamination. This contamination, including benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) migrated down-gradient below a road and neighboring property. Access below the adjacent roadway was ...


    By REGENESIS

  • Combining HVME and Enhanced Bioremdiation for Gasoline Contamination in Groundwater.

    ABSTRACT A leaking underground storage tank at a commercial petroleum retail site located in Haskell, Texas resulted in soil and groundwater petroleum hydrocarbon contamination. This contamination, including benzene, toluene, ethylbenzene, and total xylenes (BTEX) and total petroleum hydrocarbons (TPH) migrated down-gradient below a road and neighboring property. Access below the adjacent roadway ...


    By REGENESIS

  • Case study: Ford Getrag

    ISTR Overview Consultant: ICF Neighborhood: Downtown Heating Tubes: 130 Target Temp: 100 ˚C Heating Period: 49 Days Target: 6 mg/kg Destruction Rate Efficiency: > 99% ...

  • Thermal treatment of thick peat layers – DNAPL removal and shrinkage

    Abstract A PCE DNAPL source zone was treated using thermal conduction heating combined with multi-phase extraction. Thick peat layers, even when contaminated with PCE DNAPL, were remediated to average soil PCE concentrations of 0.17 mg/kg (99.6% reduction compared to starting levels). This was accomplished in 83 days of heating, by elevating the temperature to the boiling point of water, and ...


    By TerraTherm, Inc.

  • Comparing pesticide residues in Amish and commercially grown strawberries and spinach using QuEChERS, Various dSPE Sorbents, and GC-TOFMS

    Abstract QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide levels in strawberries and spinach from both commercial and Amish growers. Various dSPE cleanup products were compared to determine which were most effective. Good recoveries were obtained for most pesticides; however, low recoveries were observed for some base-sensitive or planar compounds. ...


    By Restek Corporation

  • The Generation of Pure Water

    As a world leading manufacturer of complex multi-port stainless steel diaphragm valves, GEMÜ has earned an excellent reputation in the biotech and pharmaceuticals’ markets. GEMÜ is now transferring the skills acquired in biotech and pharmaceutical applications, to water applications by designing and manufacturing plastic multi-port block valves. The space saving compact build, ...


    By Modern Pumping Today

  • What’s the Temperature? Thermal Modeling and its Importance in Thermal Remediation

    What is a model? A beautiful person who struts down a run way, a scaled down sculpture of the Empire State Building, or a series of equations that describe some phenomenon? Did you guess all of the above? Gold star! Models come in many different shapes and sizes. In the environmental consulting and remediation industry, the word “model” often refers to a numerical model. Numerical ...


    By TerraTherm, Inc.

  • Case study - Mazzei degas separator selected for Wichita aquifer storage and recovery project

    GDT Degas Separator Selected As Best Method For Entrained Gas Bubbles Removal Wichita, KS The Problem: In the 1990s, the City of Wichita, Kansas developed a water supply plan that included creating a sustainable water supply through the year 2050. The key component of the plan is recharging the large aquifer that lies under the region with 100 MGD of water from the ...

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