Device for decontaminating groundwater streams

Assembly which decontaminates an underground flow of contaminated water consists primarily of a wall (8), which in essence is uninterrupted and extends from a lower ground water horizon to an upper ground water horizon. The water flow is directed at the normal to the wall face. The wall incorporates...

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Bibliographische Detailangaben
Hauptverfasser: ZORZI, MICHAEL, MADER, HERBERT
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:Assembly which decontaminates an underground flow of contaminated water consists primarily of a wall (8), which in essence is uninterrupted and extends from a lower ground water horizon to an upper ground water horizon. The water flow is directed at the normal to the wall face. The wall incorporates one or more zones which are water-permeable in the direction of ground water flow (a). Water passes through a first face in a permeable section of the wall (1) to a chamber (6) holding decontamination or adsorption agents, and leaves again in the same direction of flow through a second face of the perforated wall (1). The decontamination extends to the ground surface where it is enclosed by a cap (11). The novelty is that: (i) the decontamination agents (16) are enclosed in a sack (15) made of geo-textiles (13) and sealed at its base; the geo-textiles rest immediately on the face of the perforated wall (1) in the direction of flow; (ii) the geo-textile and the contents (16) of the decontamination chamber can be removed from the chamber (6) with the perforated wall (1); (iii) the geo-textiles resting against the wall are held together by straps (14); (iv) the perforations on the wall (1) are also covered by a geo-textile outside the decontamination chamber; (v) the perforated walls (1) are sealed against ground water where necessary (4, 5) with concrete (3) betonite or similar; (vi) the perforated wall (1) is made of perforated planks of wood (2).