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Thursday 05 November 2009 |
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Ground Water Circulation Wells (GCWs) can be used in conjunction with other in situ remediation technologies to treat halogenated VOCs, semi-VOCs (SVOCs), pesticides, and petroleum products and their constituents such as benzene, toluene, ethyl benzene, and xylene (BTEX).
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Leggi tutto... [Modeling Efficienza GCW]
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Thursday 05 November 2009 |
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Ground Water Circulation Wells (GCWs) can be used in conjunction with other in situ remediation technologies to treat halogenated VOCs, semi-VOCs (SVOCs), pesticides, and petroleum products and their constituents such as benzene, toluene, ethyl benzene, and xylene (BTEX).
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Leggi tutto... [Pozzo di Ricircolazione della falda]
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Wednesday 10 September 2008 |
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Tuesday 29 July 2008 |
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With a GCW it is possible to remove non-miscible liquids of higher density than water (DNAPL) from an aquifer. In order to remove dense non aqueous phase liquids (DNAPL) that have accumulated on the bottom of the aquifer, the GCW is operated in standard mode. The DNAPL is removed by means of a sensor-controlled, pneumatically-driven submersible pump. Thus it is made sure that just pure phase and no groundwater is extracted.
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Leggi tutto... [DNAPL-Recovery]
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Tuesday 29 July 2008 |
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With a GCW it is possible to remove non-miscible liquids of lower density than water (LNAPL) from an aquifer. In order to remove light non aqueous liquids floating on the groundwater, the GCW is operated in a reverse mode. The LNAPL is removed by means of a sensor-controlled, pneumatically-driven submersible pump. Thus it is made sure that just pure phase and no groundwater is extracted.
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Leggi tutto... [LNAPL-Recovery]
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Wednesday 02 April 2008 |
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By means of different techniques oxygen, gas mixtures but also nutrient solutions can be added to the GCW circulation water. Thus, more oxygen-rich and contaminant-reduced groundwater circulates through the aquifer and stimulates microbiological degradation respectively creates better bio-availability. Metabolites impeding the growth of autochthonic microorganisms or the CO2 produced by the biological decomposition can be transported to the well with the groundwater and can be selectively removed there.
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Leggi tutto... [Pozzo di Ricircolo (microbiologicamente assistito)]
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Wednesday 02 April 2008 |
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The achievable sphere of influence of a GCW-System depends on the distance of the two active screen sections, the anisotropy of the aquifer, the groundwater flow velocity and the selected pumping rate. The bigger the circulation cell is, the longer a water molecule needs to pass through the cell.
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Leggi tutto... [Circolazione multipla]
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Wednesday 02 April 2008 |
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IEG uses an innovative type of Vacuum Vapor Extraction system using a specially engineered and patented Double-Cased Screen (DMF) in combination with a very low negative pressure blower. The double-cased screen consists of fine-grained filter granules sandwiched between two layers of metal sieve web with an open screened area of over 50%. The metal web is constructed such that an artificial well pack cannot significantly reduce the open screened area.
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Leggi tutto... [Double cased screen]
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Wednesday 02 April 2008 |
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Non-volatile contaminants in the unsaturated zone and in the groundwater fluctuation area can be removed by means of the soil flushing technique. Cleaned and possibly oxygen-enriched groundwater re-accesses the subsoil via drain pipes or vertical screen sections after passing a cleaning system (e.g. bio-reactor etc.).Â
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Leggi tutto... [Soil flushing]
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Wednesday 02 April 2008 |
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Soil air circular flow is employed to remediate soils polluted with volatile contaminants (e.g. CHC, BTEX, jet fuels), some semi-volatile contaminants and/or biodegradable substances. Due to the application of low negative pressure, TESAC systems can be implemented in soil, where the horizontally induced flow bypasses contaminants trapped in low-permeability layers.
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Leggi tutto... [Ricircolo aria interstiziale]
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Wednesday 19 March 2008 |
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With a GCW it is possible to remove non-miscible liquids of lower or higher density than water (LNAPL and DNAPL) from an aquifer. In order to remove light non aqueous liquids floating on the groundwater, the GCW is operated in a reverse mode.
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Leggi tutto... [Free product recovery]
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Wednesday 19 March 2008 |
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IEG uses an innovative type of Vacuum Vapor Extraction system using a specially engineered and patented Double-Cased Screen (DMF) in combination with a very low negative pressure blower. The double-cased screen consists of fine-grained filter granules sandwiched between two layers of metal sieve web with an open screened area of over 50%. The metal web is constructed such that an artificial well pack cannot significantly reduce the open screened area.
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Leggi tutto... [Double cased screen for soil air venting]
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Tuesday 18 March 2008 |
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The scientific calculation methods for the hydraulic functioning of GCW-Systems with pump and packer are developed by the Institute for Hydromechanics, University of Karlsruhe, under a research program funded by IEG.
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Leggi tutto... [VEGAS- Test Laboratorio]
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Monday 19 February 2007 |
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The vertical Groundwater Circulation Well can also be used as a pump or infiltration well for standard on-site remediation. In such cases, partial withdrawal or infiltration is taken from or added to the total volume of groundwater flowing through the well. It is possible to extract or to infiltrate water without changing the groundwater head at the well top for a specific ration of the extracted or infiltrated flow to the vertical circulation flow around the well.
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Leggi tutto... [GCW - con estrazione parziale]
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Applicationi 
