Batch operation achieving the highest cake solids of any mechanical dewatering method. Filter presses deliver 25–40% dryness, making them the preferred choice for mineral slurries, lime sludge, and landfill-bound cake where minimum volume is critical.
CFD, P&ID, SCADA and commissioning for critical water treatment plants.
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Flow, mixing and thermal CFD across treatment and process equipment.
Full mechanical, physico-chemical, biological and sludge equipment range.
Filter presses operate as a batch process. Conditioned sludge is pumped into a series of chambers formed between recessed filter plates. As pressure builds, filtrate passes through the filter cloth while solids accumulate as a cake. Once the chambers are full, a hydraulic closure maintains pressure. Optional membrane squeeze plates then inflate to apply additional mechanical pressure, extracting even more water and achieving the highest cake solids of any dewatering technology. The batch is discharged, plates are separated, and the cycle repeats.
| Parameter | Range / Value |
|---|---|
| Cake Dryness | 25–40% solids |
| Throughput | 50–2,000 kg DS/cycle |
| Energy Consumption | 10–30 kWh/tonne DS |
| Polymer Dose | 0–5 kg/tonne DS (often none) |
| Solids Recovery | 94–98% |
| Chamber Volume | 0.5–30 m³ per press |
| Filtration Pressure | 6–16 bar |
| Membrane Squeeze | Up to 20 bar (optional) |
| Cycle Time | 1.5–4 hours |
| Footprint | Medium (plate stack) |
| Materials | SS 316L, PP plates, PE membranes |
Tell us your sludge volume per batch, target dryness, and disposal route. We will size the chamber volume, plate count, and specify automatic cloth washing if required.
Process equipment and instrumentation for critical water treatment processes.
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Contact UsFull comparison of dewatering technologies: cake dryness, polymer demand, energy, and maintenance intensity.
Compare technologies →Pre-thickening to 5–8% DS before dewatering reduces equipment size and polymer cost significantly.
View guide →From dewatered cake to land application, composting, or energy recovery: regulatory pathways and design considerations.
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