An apparatus for dispersing or refining organic material, such as cellulose fibre and organic waste, the apparatus comprising: a rotor shaft extending along a rotation axis; a rotor connected to the rotor shaft so that when the rotor shaft is rotated, the rotor is rotated around the rotation axis, a housing arranged around the rotor, the housing having an inlet for receiving the organic material and an outer wall; wherein the housing is further arranged with a stator disc, and the rotor is arranged with a rotor disc, the rotor disc and the stator disc having material engaging elements, such as teeth, and the rotor disc and the stator disc being arranged opposite each other so that a gap is defined between them, whereby when the apparatus is in use, organic material introduced through the inlet will be fed by the rotating rotor through the gap between the rotor disc and stator disc and towards the outer wall of the housing, the housing further having: an outlet arranged in the outer wall, through which outlet dispersed organic material is fed for transportation out of the apparatus, and a number of dilution inlets arranged in the outer wall through which dilution inlets dilution liquid is fed into the apparatus, characterized in that at least one of the number of dilution inlets is directed into the apparatus so that the at least one dilution inlet is angled in a plane that is substantially perpendicular to the rotation axis, towards a radial (r) of the rotation axis. a rotor shaft extending along a rotation axis; a rotor connected to the rotor shaft so that when the rotor shaft is rotated, the rotor is rotated around the rotation axis, a housing arranged around the rotor, the housing having an inlet for receiving the organic material and an outer wall; wherein the housing is further arranged with a stator disc, and the rotor is arranged with a rotor disc, the rotor disc and the stator disc having material engaging elements, such as teeth, and the rotor disc and the stator disc being arranged opposite each other so that a gap is defined between them, whereby when the apparatus is in use, organic material introduced through the inlet will be fed by the rotating rotor through the gap between the rotor disc and stator disc and towards the outer wall of the housing, the housing further having: an outlet arranged in the outer wall, through which outlet dispersed organic material is fed for transportation out of the apparatus, and a number of dilution inlets arranged in the outer wall through which dilution inlets dilution liquid is fed into the apparatus, characterized in that at least one of the number of dilution inlets is directed into the apparatus so that the at least one dilution inlet is angled in a plane that is substantially perpendicular to the rotation axis, towards a radial (r) of the rotation axis. an outlet arranged in the outer wall, through which outlet dispersed organic material is fed for transportation out of the apparatus, and a number of dilution inlets arranged in the outer wall through which dilution inlets dilution liquid is fed into the apparatus, characterized in that at least one of the number of dilution inlets is directed into the apparatus so that the at least one dilution inlet is angled in a plane that is substantially perpendicular to the rotation axis, towards a radial (r) of the rotation axis.