Macerator

A slurry macerator comprising:

• a housing comprising first and second oppositely disposed sideplates;
• a slurry chamber in the housing for receiving slurry from a slurry inlet on the housing;
• a rotatable cutting plunger in the slurry chamber for macerating slurry, a plurality of slurry outlets on the housing for discharging macerated slurry from the slurry chamber wherein the cutting plunger comprises at least one cutting blade formed at a blade head with a circular outer face, the cutting blade having a chamfered cutting edge, extending outwardly from an circular inner face, the chamfered cutting edge including continuous, chamfered V-shaped cutting teeth comprising a first laterally chamfered planar cutting face, an oppositely disposed second laterally chamfered planar cutting face, and a third outwardly chamfered planar cutting face between the first chamfered cutting face and the second chamfered cutting face creating
• a circumferential V-shaped corrugated cutting edge with each of the first, second, and third cutting faces originating from the circular inner face;
• and
• a knife plate mounted on each sideplate, each knife plate comprising slurry openings to allow egress of slurry from the slurry chamber, wherein
• the blade head comprises a friction reducing insert that contacts the knife plate when the blade head contacts the knife plate to create a smooth outer face and reduce and minimise friction between the cutting blade and a knife plate.