
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
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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 moreAnimated representation to show the workings of a filter press for sludge dewatering
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 articleThese presses dewater sludges to produce a cake with a dry solids content of 30% or more in the case of primary sludge
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A screw press is a dewatering technology based on a slowly-rotating (~5 RPM) Archimedean screw within a cylindrical screen
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The filter press forces water from the sludge by applying high pressures to sludge layers held between rectangular plates
This technology removes water by passing the sludge through a narrow, rotating parallel-flow channel with porous walls
Centrifugation is used for thickening and dewatering sewage sludge − dewatered sludge has a higher dry solids concentration
Drying beds dewater sludge by allowing the liquid to drain and to evaporate. Lagoons provide dewatering through evaporation
Electro-dewatering technology provides enhanced removal by non-mechanical means through the application of an electric field