Mechanical dewatering is a key stage in process-sludge management. Through high-pressure filtration, the filter press separates water from the solid fraction, turning the liquid sludge from the clarifier into dewatered, spadeable filter cakes that can be handled as a solid material.
Designed for water recovery and waste-volume reduction, the filter presses are available as stand-alone machines or fully integrated into our complete turnkey plants.
Sludge Dewatering
Filter presses for dewatering sludge from aggregate washing, soil remediation, road sweeping and other applications
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Filter-press sizing begins with laboratory testing of the material’s filterability. The results are used to size the plates, filter cloths and pumps according to the process requirements and configure the system for the specific production cycle.
Sidebar filter press
Designed for the mechanical dewatering of sludge in standard and medium-output applications (with a capacity of up to around 3.3...
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Overhead-beam filter press
The Tecnoidea overhead-beam filter press is designed for mechanical sludge dewatering in high-output applications. It separates the water from the...
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In water and process-sludge treatment, clarification alone is not sufficient to complete the water-recovery loop. The clarifier returns a thickened but still fluid sludge (typically around 70% water and 30% solids), which would require large drying basins for natural dewatering.
At this stage, the liquid sludge is pumped under pressure into the filter chambers formed by the plate pack and lined with filter cloths. Under filtration pressure, the filtrate passes through the filter cloths and is collected for recirculation, while the solids remain trapped in the chambers. The process produces solid, easily handled filter cakes.
Sludge-dewatering performance depends strongly on the characteristics of the material being treated. A clay-rich sludge from aggregate washing at a quarry requires feed pressures, cycle times and chemical-conditioning systems (such as milk-of-lime dosing) that may differ significantly from those required for sludge generated by road sweeping or stone processing. For this reason, filter-press configuration and sizing must be adapted to the specific behaviour of the sludge.
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