The invention describes a process of concentration of solid particle water suspension, including the following stages: introducing the water suspension of solid particles into a container, adding at least one organic polymer plankton to addict to the solid particle water suspension, It is made of floating solids, which allow floating solids to settle at the bottom of the container to form a single suspended bed, so that the solid bed flows from the container as a low flow,A container in which a part of the solid bed or downstream flow is transferred to the solid bed or upstream in the form of a recovery flow, in which at least one activator is transferred to the solid, At least one of the active molecules is selected from a group of free radicals, oxidants and reducers
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