blow tank of a digester to dilution 30 and diluted to a consistency of approx 4 after the dilution the pulp is taken to a thickener 32 in which the pulp is thickened to a consistency of about 10 15 the medium consistency pulp obtained is supplied to a displacement stage 34 into which clean wash liquid is supplied the pulp is further taken to a thickening stage 38 in which liquid is removed from the pulp so as to raise the consistency to the range of 30 40 it is typical of the state of the art wash press arrangements that the filtrates f w f t1 and f t2 obtained as well from the washing as from the preceding and subsequent thickening stages are combined irrespective of their different concentrations a portion f 1 of the filtrate mixture f obtained in this way is used in the dilution stage 30 to dilute pulp while the other portion f 2 goes to chemical recovery or some other further use or treatment fig8 illustrates a wash press arrangement according to the invention the most significant difference of which compared to the arrangement of fig5 is that the wash press includes two.