Applications
Desalination Plants
Pre-treatment filtration protecting SWRO membranes from suspended solids and biofouling.
Specifying note
SDI₁₅ below 3 is the target leaving pre-treatment. Low acid solubility matters here — media that dissolves shifts the gradation and lets fines reach the membranes.
Design parameters
- Filtration rate
- 10 – 20 m/h
- Target SDI₁₅
- < 3
- Acid solubility limit
- ≤ 1.5%
Typical bed configuration
| Layer | Media | Gradation | Depth |
|---|---|---|---|
| Coarse layer | Filter anthracite | 0.8 – 1.6 mm | 500 mm |
| Filtration layer | Silica filter sand | 0.8 – 1.6 mm | 400 mm |
| Support layers | Support gravel | 2 – 32 mm | 450 mm |
- Layer
- Coarse layer
- Media
- Filter anthracite
- Gradation
- 0.8 – 1.6 mm
- Depth
- 500 mm
- Layer
- Filtration layer
- Media
- Silica filter sand
- Gradation
- 0.8 – 1.6 mm
- Depth
- 400 mm
- Layer
- Support layers
- Media
- Support gravel
- Gradation
- 2 – 32 mm
- Depth
- 450 mm
A starting point, not a design. Final layer depths follow from vessel diameter, design filtration rate and target effluent quality.
Recommended media
Related applications
Municipal Water Treatment
Rapid gravity and pressure filters producing potable water for towns and cities.
Reverse Osmosis Plants
Guard beds and carbon filters protecting membranes from particulates and chlorine.
Swimming Pools
Pool sand and glass-clear filtration for commercial, hotel and public pools.
Wastewater Treatment
Tertiary filtration and effluent polishing ahead of discharge or reuse.
Need this grade?
Send the gradation, the volume and the destination port. Our technical team responds within one working day with pricing, lead time and a specimen certificate of analysis.