of slurries in conduits 31 and 34 merge into conduit 39 between the conduit junction 38 and the top separator 12 of the digester vessel 11 the chip slurry flow in conduit 31 may have a substantially greater ratio of liquor to chips than the liquor to chip ratio in conduit 34 accordingly adding the high liquor content flow from conduit 31 may increase the ratio of liquor to chips in conduit 39 the volume of flow through conduits 30 31 may be relatively small compared to the volume in conduit 34 by merging the chip slurry from the low pressure discharge conduits 30 31 with the chip slurry from the high pressure discharge conduit 34 the chips in conduit 30 are directed to the digester chips in the low pressure discharge flow conduit 30 that would otherwise clog conventional liquor processing systems are introduced to the digester the pump s 37 may each be a screw centrifugal impeller slurry pumps or other pressurizing and transferring devices such as a piston type solids pump or a high pressure eductor preferably multiple pressurizing and slurrying pumps 37 e g up to four are used to transfer the slurry through conduits 30 31 and pressurize the low pressure discharge flow the pumps 37 may be a screw centrifugal impeller pump.