ADVANCES IN IMPULSE DRYING OF SLUDGE
Author: Banerjee, Sujit
Source: Proceedings of the Water Environment Federation, WEFTEC 2001: Session 31 through Session 40 , pp. 943-945(3)
Publisher: Water Environment Federation
Abstract:In impulse drying, a hot roll is applied to a wet web, and the pressure of the steam generated within the web expresses water in liquid form. The technique has been applied to sludge dewatering and a full-scale unit has been constructed. The machine incorporates a belt that conveys the sludge through a nip, a heated top roll and a cold lower roll. An open upper belt sinks into the web to give it “body” and assist its transport through the nip. A typical solids increase of up to twenty percentage points over belt-pressed sludge can be realized if the sludge is predominantly comprised of primary material. The throughput is of the order of 2 dry tons per meter per hour, but decreases with increasing biological content of the sludge.
Document Type: Research Article
Publication date: 2001-01-01
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