Method and apparatus for removing sediments in stretches of water by dredging and mechanical dewatering of the dredged material

摘要

To enable mud and sludge to be deposited independently of the hitherto necessary depositing sites and to also achieve the aim of dumping according to volume-reducing treatment methods, the dredged material is classified for separating its sand portion from the silt-particle and clay-particle fraction as well as from the organic sludge portion. The sand portion is discharged directly for utilisation or dumping. The silt-particle/clay-particle and sludge fraction is mechanically dewatered and removed. To carry out this method a floating dredger is used which is provided with a device for transferring the dredged material to a classifier. Immediate transfer of the separated sand fraction into separate transport systems can be carried out by a transport device, and transfer of the silt-particle/clay-particle and sludge fraction to a mechanical dewatering station can be carried out by a further transport device.