The present invention relates to a method for treatment of a slurry comprising a liquid and particles suspended in the liquid. The method comprising the steps of providing a slurry to be treated; subjecting the slurry to a separating stage in which the particles of the slurry are divided into at least two subsets, a first subset being generally less difficult to dewater than a second subset; feeding a pressure filter with a flow of the first and second subsets, wherein in a first feeding step, a major part of the flow is defined by the first subset and in a subsequent second feeding step, a major part of the flow is defined by the second subset.