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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 moreMore on 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
Latest features and blogs
Feature
Microwave drying of sewage sludge: performance and energy demand
Microwave drying of mechanically-dewatered sewage sludge presents an alternative to the conventional convective and conductive thermal drying technologies. MW drying offers higher throughput capacities, and may be viable at smaller scales.
Read article
How does a screw press work?
Animated representation to show the workings of a screw press for sludge dewatering
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