A manure separator (200) comprising a filter (100), wherein the filter comprises the following parts: two or more axially stacked and interconnected rings (110), wherein the rings (110) are characterized in that the thickness of the rings (110) is not equal around the circumference of the rings (110), generating a minimum thickness (111) and a maximum thickness (112), with the thickness difference (113) being defined as the difference between the maximum thickness (112) and the minimum thickness (111), creating one or more openings (120 between the two or more rings (110).
