Impervious layer formation process and landfill adsorption system
AssigneeDyckerhoff & Widmann Aktiengesellschaft
InventorsKlemens Finsterwalder, Jurgen Spirres
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Abstract
An arrangement for retaining harmful substances contained in water seeping from a waste dumping ground body includes an impervious layer of mineral sealing materials, such as clay, with an adjacent adsorption layer containing materials capable of binding harmful substances by physical and/or chemical adsorption. The materials may be in the form of admixtures. When seepage water flows very slowly through a layer of mineral sealing materials, it is possible to remove and retain the harmful substances. The permeability of the arrangement reduces with time due to the adsorption process with its sealing effect improving over geological time periods.
Claims17
Arrangement for removing harmful substances from water seeping from a waste dumping ground body into a natural soil formation, comprising at least one impervious layer containing mineral sealing materials, wherein the improvement comprises an adsorption layer located adjacent to the impervious layer, said adsorption layer includes materials capable of binding the harmful substances in the water seeping from the waste dumping ground body by at least one of physical or chemical adsorption, the adsorption layer is located downstream of the impervious layer relative to the direction of flow of water through the impervious layer and between the natural soil foundation and the impervious layer so that water exiting from the adsorption layer flows into the natural soil formation free of any flow blockage, the adsorption layer includes mineral sealing materials mixed with adsorbing materials, said mineral sealing material comprises clay, and the adsorption layer is formed of at least two different adsorption layers, each of the different adsorption layers contains material with different adsorption characteristics.
Process of forming an impervious layer of mineral clay sealing materials for a waste dumping ground body, comprising forming a prepared earth base in earth in which the waste dumping ground body is to be formed, forming a premixed dry mixture consisting of mineral clay sealing materials free of water, and installing the mixture in a dry state separate from the earth forming the earth base as a lining layer for the waste dumping ground body, and supplying moisture required for the effectiveness of the lining layer after installing the layer.
Process of forming an impervious layer of mineral clay sealing materials for a waste dumping ground body, comprising forming a prepared earth base in earth in which the waste dumping ground body is to be formed, forming a premixed dry mixture consisting of mineral clay sealing materials free of water, installing the mixture in a dry state separate from the earth forming the earth base as a lining layer for the waste dumping ground body, forming the lining layer with a first surface facing the earth base and an oppositely directed second surface, depositing at least one adsorption layer adjacent one of the first and second surfaces of the lining layer, and utilizing as the adsorption layer materials capable of binding harmful substances in water seeping from the waste dumping ground by at least one of physical or chemical adsorption.
Dependencies are inferred from the claim text.