Apparatus for the treatment of solvent extraction residue

An apparatus for the treatment of spent material, said treatment comprising the steps of the desolventizing and toasting of said spent material to yield desolventized spent material and/or the drying and cooling of said desolventized spent material to yield meal, wherein the apparatus comprises a vessel with an inner volume, said inner volume comprising two or more compartments stacked on top of each other in axial direction, each compartment comprising a tray for receiving spent material to be treated, each tray being equipped to permit downward movement of spent material towards an outlet for the spent material, characterised in that at least a lower part of the vessel is equipped with at least one inlet for supplying a flow of at least one fluid phase and causing said fluid phase to move in upward direction of the vessel through the spent material with the purpose of desolventizing and toasting and/or drying and cooling said spent material, wherein the apparatus comprises at least a pulsating member for causing at least a portion of the said at least one fluid phase to be supplied in a pulsating manner.