Process for purifying a fine grain fraction of contaminated soil comprises preparing a fine grain suspension, adding a dispersing agent, and separating a liquid supernatant formed from the sediment

摘要

Process for purifying a fine grain fraction of contaminated soil comprises preparing a fine grain suspension (25), adding a dispersing agent (28) and adding the suspension to a sedimentation device (21) to start the sedimentation phase, and separating a liquid supernatant formed after the sedimentation time in the device from the sediment. An Independent claim is also included for an apparatus for purifying a fine grain fraction of a contaminated soil comprising a sedimentation device (21) consisting of a container for receiving a fine grain suspension and a dispersing agent, and a separating device for separating a liquid supernatant formed after the sedimentation time in the device from the sediment (30).