Method, installation and composition for the storage of contaminated material

摘要

The invention relates to the storage of contaminated material (6a) under a water layer (12), in particular the storage of bottom ash. The invention provides for this purpose a method for storing a contaminated material (6a) under a water layer (12), comprising the processing steps of supplying the contaminated material (6a), supplying ground material (6b), mixing (7) the contaminated material (6a) with the ground material (6b) and arranging the mixture (10) of contaminated material (6a) and ground material (6b) in or under a retention layer (13) situated under a water layer (12), and wherein the mixture (10) is not in contact with the water layer (12), and the retention layer (13) comprises ground material (6b). The invention also provides an installation for storing contaminated material (6a) and a composition comprising the contaminated material (6a).