Abstract: In a device for the dewatering of naturally moist lump peat in natural obtained state and without flocculation agent through pressing, to obtain a natural composition, in terms of particles, of the dewatered product it is proposed that a system is integrated into the device, which has means (1,2,3,4,5) for the collection of the fluid pressed out via screens (31,32) and of the used water for the cleaning of the screens at their points of accumulation, for the static filtering (6,7) of the collected suspension, for the mixing together (30) of the fraction, separated there and condensed, with the fresh material which is to be treated and pressed by the device (34), for the guidance (11) of a portion of the filtrate separated there, essentially of a particle-free water, for the cleaning (12) of the screens (31,32) and for the removal (10) out of the device of a surplus portion of the separated filtrate exceeding the requirement of this cleaning.