Problems · Troubleshooting

Why Filter Cake Sticks & Is Difficult to Discharge

Symptoms · Root Causes · Proven Solutions

Cake sticking is a surface-release problem: the formed cake remains bonded to the cloth after the plates open, increasing manual scraping and leaving residue that slows the next cycle. Evaluate particle fineness, flocculant condition, cloth surface and installation tension rather than treating it only as pore blinding.

The Problem

What Is Happening?

If filtration flow is acceptable but the cake will not release, focus on the interface between cake and cloth. Sticky colloids, gel-forming chemical dosage and a rough or unsuitable weave are more relevant than simply increasing feed pressure.

Common Symptoms

Incomplete cake shedding after plates open
Thick residual sludge remains on the cloth surface
The next filtration cycle becomes much slower
Manual cleaning labor costs remain high

Root Causes

4 Root Causes

Ultra-Fine Colloids

Fine colloidal particles create strong adhesion between cake and fibers.

Wrong Weave Structure

The cloth surface lacks anti-stick performance.

Excess Flocculant

Overdosing creates sticky gel residue.

Low Cloth Tension

Loose installation allows the cake to grip the cloth tightly.

Proven Solutions

3 Recommended Actions

Solution 01

Use Smooth Anti-Stick Cloth

Adopt a smooth, non-stick coated surface with an optimized weave.

Solution 02

Correct Slurry Conditioning

Adjust flocculant concentration and feed solids to reduce gel formation.

Solution 03

Improve Cake Release

Set uniform cloth tension and keep the discharge surface clean between cycles. Where process conditions permit, combine a smoother monofilament-style surface with plate vibration or another cake-drop aid instead of relying on manual scraping.