DAF Sludge Thickening

Thin DAF float — often below 1% dry solids — is expensive to store and haul and difficult to dewater directly. A screw thickener, or the integrated thickening zone of a screw press, raises the solids to 5–8% before the pressing stage, sharply reducing volume. Thickening first stabilises the downstream dewatering step, lowers polymer demand per tonne and, where dewatering is not required, can itself deliver a pumpable thickened sludge for digestion or tankering.