TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The screw coil side of the prong recess is formed such that the prong recess is penetrated through the respectively associated raking prong during screw shaft rotation with a defined gap distance form and/or contour-adjustment. At least one raking prong with its free prong end is associated to the associated screw shaft. The free prong end is present with partial region or the free prong end exhibits a defined gap distance from the screw shaft. The gap distance between the prong end and screw shaft in the rotational direction of the screw shaft increases, preferably expands in a sickle-shaped manner. The raking prong is adjustable in its distance to the associated screw shaft and/or its length such that at least one raking prong for adjusting a defined gap size between at least one raking prong and the associated screw shaft is displaced to or away from in the direction of the associated screw shaft. The peripheral edges, which form prong recess, of the screw coil and/or the prong end of the raking prong comprises and/or forms at least one cutting- and/or blunt edge. At least one cutting- and/or blunt edge is wedge-shaped and/or tapered to a point. At least one cutting- and/or blunt edge is formed by stepwise and/or fissured surface structure. At least one cutting- and/or blunt edge is aligned to least one peripheral edge of pong recess and/or pong end of the respectively associated raking prong transverse to the rotational axis of at least one screw shaft. The raking device extends over at least one partial region of length of the associated screw shaft. The raking device comprises many mutually spaced raking prongs in a screw shaft-longitudinal direction. The supply device comprises an insertion opening (34), which is formed at the extruder housing. The biomass, which is to be extruded, is fed to the cell disintegration extruder through the insertion opening. A throw-in shaft is arranged above the insertion opening. The throw-in shaft is provided at a top feed hopper downwardly for insertion opening and comprises downwardly and conically expanding tubular shaft, preferably with an inspection opening. The raking device and the raking prong are arranged in a screw shaft region, which is facing the insertion opening. A guide element in the form of a prism is arranged in the region of insertion opening, preferably on the peripheral edge of the insertion opening and/or at peripheral edge portion of throw-in shaft facing the insertion opening and/or at downstream front portion of the insertion opening in the conveying direction. The guide element extends in the transverse direction and/or a defined partial area in the region of insertion opening. The raking prong is displaced downward in the vertical axis direction from the insertion opening such that the raking prong has defined minimum distance from the insertion opening in a vertical axis direction. The raking prong with partial region having free prong end extends in a straight extension along the screw shaft radius starting from the shaft rotational axis from the screw shaft. The cell disintegration extruder is a twin-screw extruder with two screw shafts. The raking device with their respective raking prongs extends inwardly in the direction of one of the two screw shafts with respect to housing walls, preferably housing side walls, which are opposite to the adjacent screw shaft, in transversely adjacent screw shafts. A housing-side guide element is arranged in the insertion region of two successive screw shafts, which is to be rotated, on at least one side of this insertion region, where the biomass, which is to be extruded, is led away on the position and rotating direction in the direction of insertion region of the two screw shafts. The raking device is connected integrally or detachably to the extruder housing. The raking device comprises a support plate, which is detachably connected to the housing inner wall and protrudes from the raking prong.