Water Recovery
Why returning the filtrate is part of the process, not a waste stream.
Recovered water is the part of the plant that pays for itself: less make-up water, fewer tanker movements, a steadier circuit.
- Filtrate clarity
- Clear enough for the reuse point
- Reuse point
- Slurry / wash circuit
- Recovery
- Most of the filtrate
Why this matters
Recovered water is the part of the plant that pays for itself: less make-up water, fewer tanker movements, a steadier circuit.
Filtrate is the largest stream that leaves a filter press, so where it goes decides how hard the press has to work. Returning it to the slurry tank or the wash bay cuts make-up water and keeps the density of the circuit stable. Where water has to be discharged, the discharge limits set the extra treatment step.
Key engineering points
-
Reuse point decides the target
Water going back into a bentonite mixer has to be cleaner than water going to a wash bay.
-
The circuit gets steadier
Reusing filtrate keeps the slurry tank level and the density stable.
-
Discharge limits are a design input
Where water must be discharged, the limits set the treatment step.
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
Usually most of it; the balance follows the water that leaves with the cake.
Only where the discharge limits or the reuse point demand 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.
Water Recovery
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
- [email protected]
- Phone
- +86 139 0534 1263