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Thursday, 5. November 2009 |
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Successful application of GCW technology requires that its zone of influence (ZOI) be known and predicted prior to installation. For each GCW System, a unique, site-specific hydraulic zone of influence will be established.
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weiter … [Modeling GCW Efficiency]
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Thursday, 5. November 2009 |
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Beim klassischen "Pump-and-Treat"-Verfahren wird üblicherweise das Grundwasser aus einem oder mehreren Brunnen entnommen, in einer oberirdischen Anlage gereinigt und über die Kanalisation oder einen Vorfluter abgeleitet.
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weiter … [Allgemeine Grundlagen der vertikalen Grundwasserzirkulation]
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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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weiter … [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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weiter … [LNAPL-Recovery]
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Wednesday, 2. April 2008 |
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Biologische Sanierungstechniken unterstützen die natürlich ablaufenden Abbauprozesse im Untergrund und beeinflussen die Umwelt in der Regel daher nur wenig. Die Schadstoffe werden vollständig mineralisiert, eine Abluftbehandlung entfällt.
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weiter … [Mikrobieller Abbau]
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Wednesday, 2. 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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weiter … [Stacked GCW]
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Wednesday, 2. 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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weiter … [Double cased screen]
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Wednesday, 2. 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.).
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weiter … [Soil flushing]
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Wednesday, 2. 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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weiter … [Thermally enhanced soil air circulation (TESAC)]
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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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weiter … [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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weiter … [Double cased screen for soil air venting]
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Tuesday, 18. March 2008 |
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Hintergrund:
Wenn eine Anzahl an MLSW Systemen an einem Standort benutzt werden, kann ein sehr detailliertes, dreidimensionales Profil über die Boden- und Grundwasserkontamination erstellt werden. Das patentierte modulare System kann für die Ansprüche eines jeden Projekts maßgefertigt werden, abhängig von den Ergebnissen einer “geoenvironmentalen” Untersuchung oder alternativ basierend auf vorher festgelegten Tiefen, die interessieren. Der MLSW kann vom Überwachungsbrunnen abgetrennt werden.
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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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weiter … [VEGAS- large-scale Laboratory Investigation]
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Monday, 19. February 2007 |
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A GCW can also be operated in a way that a certain quantity of water passing through the well shaft is pumped-off or infiltrated into it. Extracting exactly the same amount of water as the upstream into the well, the groundwater downstream from the well is blocked.
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weiter … [GCW - Partial Extraction Technology]
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Anwendungen 
