Abrégé

A geological repository adapted for permanent isolation of hazardous waste and a method permanently isolating hazardous waste from the biosphere are disclosed. The geological repository includes a near surface void having side walls and a floor disposed in a geologically stable formation. The geologically stable formation is selected to have low permeability, thereby providing a barrier to ingress of groundwater. The repository is provided with a ramp to the floor of the void for movement of hazardous material transporting vehicles and an inflatable cover configured to provide a barrier between the void and the surface environment. The inflatable cover has a flexible top layer adapted to extend over the entire area of said void and outer edge elements which form a plurality of skirt flaps disposed along its perimeter. An anchor is used to secure said skirt flaps to a surface perimeter of said void so as to maintain a seal between the inflatable cover and said void. One or more sealable access hatches are provided in the inflatable cover to allow access of personnel and hazardous material transporting vehicles between said void and the surface environment. The repository is also provided with a fan for inflating the inflatable cover.

Classes IPC  ?

• E04H 15/20 - Tentes ou abris provisoires, en général gonflables, p. ex. dressés, renforcés ou supportés par un fluide sous pression
• B09B 1/00 - Mise à la décharge des déchets solides
• G21F 9/34 - Moyens de se débarrasser des résidus solides

Abrégé

The disclosure provides a process for immobilising hazardous waste, in particular hazardous liquid waste comprising or contaminated with hazardous organic compounds and/or POPs, inorganic compounds, or low level radioactive waste. Said process comprises dispersing said hazardous waste in a non-swelling clay to form a dry mixture; mixing a cementitious binder and, optionally, water with the dry mixture to produce a plastic mixture; and allowing the plastic mixture to set to an immobilised waste material.

Classes IPC  ?

• G21F 9/16 - Traitements par fixation dans un milieu solide stable
• G21F 9/30 - Traitements
• C04B 14/10 - Argile
• C02F 11/00 - Traitement des boues d'égoutDispositifs à cet effet
• B28C 7/00 - Commande de l'opération de production des mélanges d'argile ou de ciment avec d'autres substancesAlimentation ou dosage des ingrédients pour les mélanges ci-dessusDéchargement du mélange
• C04B 28/04 - Ciments Portland
• B28C 5/00 - Appareillages ou procédés pour la production de mélanges de ciment avec d'autres substances, p. ex. coulis, mortiers, compositions poreuses ou fibreuses
• C04B 7/04 - Ciment Portland utilisant des matières premières contenant du gypse
• C04B 11/30 - Leurs mélanges avec d'autres matières inorganiques cimentaires avec des ciments hydrauliques, p. ex. avec des ciments Portland
• B01J 20/12 - Argiles d'origine naturelle ou terres décolorantes
• B09B 3/00 - Destruction de déchets solides ou transformation de déchets solides en quelque chose d'utile ou d'inoffensif