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Belt filter presses for sludge dewatering
These presses dewater sludges to produce a cake with a dry solids content of 30% or more in the case of primary sludge
Sludge dewatering
Introduction to sludge dewatering
Dewatering processes provide a concentrated, consolidated product − retaining most of the solids from the original sludge – along with a diluted stream which is predominantly water.
Dewatering processes apply a significant mechanical force to achieve increased water removal over that possible from thickening.
Learn moreHow does a filter press work?
Animated representation to show the workings of a filter press for sludge dewatering
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Screw presses for sludge dewatering
A screw press is a dewatering technology based on a slowly-rotating (~5 RPM) Archimedean screw within a cylindrical screen
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Filter presses for sludge dewatering
The filter press forces water from the sludge by applying high pressures to sludge layers held between rectangular plates
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Rotary presses for sludge dewatering
This technology removes water by passing the sludge through a narrow, rotating parallel-flow channel with porous walls
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Centrifugal sludge dewatering
Centrifugation is used for thickening and dewatering sewage sludge − dewatered sludge has a higher dry solids concentration
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Sludge drying beds and lagoons
Drying beds dewater sludge by allowing the liquid to drain and to evaporate. Lagoons provide dewatering through evaporation
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Other sludge dewatering processes
Electro-dewatering technology provides enhanced removal by non-mechanical means through the application of an electric field
