Cake Squeezing
How a membrane plate squeezes water out of the cake after the chambers have filled.
Filtration has a ceiling; squeezing raises it. The membrane pushes the cake from both sides and the water leaves through the cloth.
- Squeeze pressure
- 1.0 – 2.5 MPa
- Cake moisture
- 25 – 40 %
- Membrane life
- Confirmed for the duty
Why this matters
Filtration has a ceiling; squeezing raises it. The membrane pushes the cake from both sides and the water leaves through the cloth.
A membrane plate carries a flexible diaphragm behind the filter cloth. Once the chambers are full, water or air pressurises the diaphragm and the cake is compressed from both sides. Water that pressure alone would leave behind is displaced through the cloth, so the same frame produces a drier and firmer cake.
Key engineering points
-
Squeeze is mechanical
No more water is pumped in; the cake is compressed and the water is displaced.
-
Cake release improves
A squeezed cake is firmer and comes off the cloth cleanly.
-
Membranes are a wearing part
They are sized and specified for the cycle count of the duty.
Process flow
The stages below are the standard DELIAN sequence — the same sequence drawn as a rail and explained stage by stage.
- 01ScreeningRemove coarse solids before the slurry enters the separation circuit.
- 02DesandingRecover the sand fraction with hydrocyclones and a sand screw.
- 03ConditioningDose flocculant and mix so the fines can be filtered.
- 04Filter pressDewater the conditioned slurry in the filter press.
- 05Water recoveryReturn clear filtrate to the slurry circuit.
- 01
Screening
Remove coarse solids before the slurry enters the separation circuit.
- 02
Desanding
Recover the sand fraction with hydrocyclones and a sand screw.
- 03
Conditioning
Dose flocculant and mix so the fines can be filtered.
- 04
Filter press
Dewater the conditioned slurry in the filter press.
- 05
Water recovery
Return clear filtrate to the slurry circuit.
Related equipment
Where this is applied
Industrial Sludge Dewatering
Process and wastewater sludge dewatering, with the filtration cycle matched to the sludge chemistry.
Construction Sludge Dewatering
Excavation, diaphragm wall and wash-water sludge, reduced to a transportable cake.
Bentonite Slurry Dewatering
Turning spent bentonite suspensions into stackable cake and reusable water.
Frequently asked questions
When cake transport or tipping is charged per tonne, or when the cake has to be stackable.
Fines-heavy sludges respond best; a jar test shows the gain before you buy it.
Tell us about your slurry
Every slurry is different. Send us your slurry characteristics and project requirements so our engineering team can evaluate a suitable dewatering solution.
Cake Squeezing
Tell us about your slurry
Every slurry is different. Send us your slurry characteristics and project requirements so our engineering team can evaluate a suitable dewatering solution.
- Process evaluation based on real slurry data
- Equipment and layout proposal for your capacity
- Cake moisture and water recovery targets
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- Phone
- +86 139 0534 1263