Ultra Filtration
Overview
Green Nature Solutions Ultra Filtration (UF) systems use hollow fibre or spiral wound membranes with pore sizes of 0.001 to 0.1 micron to physically remove suspended solids, colloids, bacteria, viruses, protozoa and high-molecular-weight organic compounds from water. UF operates at low pressure and without chemicals, making it an energy-efficient and environmentally friendly treatment solution.
How It Works
Feed water is pressurised at 1–3 bar and passed through the UF membrane. The small pore size physically blocks all particles larger than 0.1 micron while allowing water, dissolved salts and small molecules to pass as clean permeate. Periodic automatic backwashing flushes retained solids from the membrane surface, maintaining consistent flux and performance.
What UF Removes
| Contaminant | Removed |
|---|---|
| Suspended Solids & Turbidity | ✓ |
| Bacteria | ✓ (> 99.99%) |
| Viruses | ✓ (most) |
| Protozoa & Cysts | ✓ |
| Colloids | ✓ |
| High-MW Organic Molecules | ✓ |
| Dissolved Salts & Minerals | ✗ |
Applications
- Pre-treatment before RO membranes — replaces conventional multimedia filtration
- Surface water and river water clarification
- Municipal drinking water plants
- Food and dairy processing
- Pharmaceutical and biotech water systems
- Wastewater reclamation and recycling
- Swimming pool water polishing
- Industrial process water
Key Features
- Chemical-free filtration at very low operating pressure
- Consistent permeate quality regardless of feed water variation
- Compact modular design — easily scalable
- Automatic backwash and CEB (Chemically Enhanced Backwash)
- Long membrane life — 5–7 years with proper maintenance
- Integrates seamlessly with RO systems as pre-treatment
- PLC-based fully automatic operation
Technical Specifications
| Parameter | Details |
|---|---|
| Pore Size | 0.001 – 0.1 micron |
| Capacity | 0.5 – 200 m³/hr |
| Operating Pressure | 1 – 3 bar |
| Turbidity Removal | > 99% |
| Bacteria Removal | > 99.99% (log 4) |
| Membrane MOC | PVDF / PES / PAN |
| Backwash Frequency | Every 20–60 minutes (automatic) |