Filter Presses
Powerful solid–liquid separation via pressure-driven dewatering for high-solids cake production
Overview
Cube Consolidating Filter Presses support effective dewatering of slurries and sludge using hydraulic or pneumatic pressure. Feed material is injected centrally into a bank of plates, separated by filter cloths. As each chamber fills, pressure increases until sludge caking prevents further flow into the chambers, forming dense solids layers for efficient liquid removal. Operators may then apply compressed air or high-pressure water to further purge moisture air being faster, and water often more cost-efficient.
Technical Highlights
- Typical operating pressure: 7–20 bar (higher for membrane designs)
- Cycle duration: 1–2 hours per batch, depending on feed solids and cake thickness
- Dry solids range: typically 30–60+ %, depending on sludge conditioning and compression method
- Cake thickness: up to 50 mm in plate & frame, recessed designs allow ~32 mm; membrane presses may reduce moisture content further.
How Filter Presses Work
Slurry is introduced into the filter press through a central feed chamber, filling each plate-to-plate chamber sequentially. Optimal design ensures uniform filling before the first chamber cakes. Once chambers are full, pressure—typically up to 7 bar or more—is maintained to compress solids. Filtrate exits through cloths into channels while solids remain trapped as cake.
Cake release is followed by optional operations such as air blowing and wash steps to improve dryness and purity. Depending on configuration—plate & frame, recessed-plate, or membrane type—automated or manual plate shifting, cake washing, and cloth cleaning may also be featured.
Key Benefits
- Very High Dry Solids Output: Achieves 30–60 % or more dry solids, greatly reducing disposal volume.
- Superior Filtrate Quality: Produces ultra-clear filtrate with minimal residual suspended solids.
- Large Filter Area in Compact Footprint: Plate stacks offer extensive surface area in a relatively small installation space.
- Adaptable for Complex Sludges: Effective even with difficult or chemically reactive solids, including industrial, mining, hazardous or pharmaceutical slurries.
- Automatable Design: Fully-automatic variants with membrane plates, plate shifting, cake release, and cloth washing expedite cycles.
Industries Where Filter Presses Are Used
Cube Consolidating Filter Presses are used in industries including:
- Mining & mineral processing – tailings dewatering and sludge thickening
- Municipal & industrial wastewater – biosolids, digester sludge, sludge volume reduction
- Chemical & petrochemical – catalyst separation, solvent and reagent recovery, product purification
- Food & beverage, pharmaceuticals, and materials handling – juice clarification, oil processing, hygienic solids management
Membrane filter designs are especially suited to high-purity or high-solids applications where maximum dryness and filtrate recovery are essential.
Customization & Integration
Cube Consolidating offers:
- Filter press types: plate & frame, recessed-plate, membrane-enabled
- Automation options: plate shifting, cloth washing, cake discharge, air or wash-cycle features
- Material construction: Mild steel, 3CR12, stainless options including SS304 and SS316
- Functional components: hydraulic systems, cloth types, cake washing ports, PLC and control systems
- Skid-mounted modular designs for ease of installation and maintenance