PCT No. PCT/NL96/00231 Sec. 371 Date Mar. 10, 1998 Sec. 102(e) Date Mar. 10, 1998 PCT Filed Jun. 10, 1996 PCT Pub. No. WO96/41670 PCT Pub. Date Dec. 27, 1996A method for filtering out of a liquid at least one solid substance includes supplying the liquid containing the substance via axial supply to a filter; filtering the liquid wherein the substance remains in the filter as residue; draining away the liquid; compressing a predetermined amount of residue to the shape of a solid bar under the pressure of the liquid during filtering; opening closeable discharge axially opposite the supply end during filtering; and removing the bar out of the filter under the pressure exerted by the liquid on the bar.