A slurry macerator (1) comprising a housing (2), a slurry chamber (3) in the housing (2) for receiving slurry from a slurry inlet (6) on the housing (2), a rotatable cutting plunger (4) in the slurry chamber (3) for macerating slurry, a plurality of slurry outlets (7) on the housing (2) for discharging macerated slurry from the slurry chamber (3) wherein the cutting plunger (4) comprises at least one cutting blade (35) having cutting teeth (9).
