Lump segregating slurry feed diffuser

A feed diffuser for use in a rotating screen having drain holes, comprising:

• a flow chamber having an upstream end and a downstream end and defining a flow path for a slurry having solid material larger than the drain holes flowing between the upstream end and the downstream end;
• the flow chamber having an intermediate portion disposed between the upstream end and the downstream end;
• the intermediate portion having a first side opening and a second side opening opposite the first side opening;
• the flow chamber having an inclined floor, the lowest point of the inclined floor being adjacent to the first side opening;
• whereby the inclined floor is sufficiently inclined such that when the slurry flows down the flow path, the larger solid material is directed towards the first side opening and a solids-reduced slurry is directed towards the second side opening.