Abstract: A macerator includes a housing that defines a chamber, an inlet and an outlet, the inlet to receive a flow of slurry; two or more elongate concentric bodies located within the chamber defining a gap between the surface of the outer body and the inner surface of the housing, at least one of the bodies rotatable about an axis, and each body comprising a plurality of apertures defining a flow path through each body; a baffle(s) that extend substantially the width of the gap to define a first portion containing the inlet, and a second portion containing the outlet, baffle(s) substantially inhibiting passage of slurry between the two portions via the gap such that the slurry is directed through the body apertures; a motor to drive the rotating body(ies); one or more injectors that inject liquid into the gap, at least one injector located in the first portion.

Abstract: Described is a macerator and process for using the macerator to reduce the particle size of a particulate containing slurry that is introduced to the macerator.