Ultrafiltration is one of the most useful and least understood technologies in water treatment. A UF membrane removes suspended solids, turbidity, bacteria and cysts, but lets dissolved minerals pass through. That means safe, clear water without the taste change or water loss of RO. Intellect Aqua designs and installs UF plants in Coimbatore for drinking water, RO pre-treatment and wastewater reuse.
How Ultrafiltration Works
UF uses hollow-fibre membranes — bundles of thin tubes with tiny pores in their walls. Water is pushed through these pores, and anything larger than the pore size stays behind. This includes silt, colloids, most bacteria, protozoan cysts and much of the organic matter. Dissolved salts and minerals are small enough to pass through.
At regular intervals, the plant runs a backwash, pushing clean water in the reverse direction to clean the membrane surface. Periodic chemically enhanced backwashes remove stubborn fouling, keeping the membranes productive for years.
UF vs RO — Which Do You Need?
| Factor | Ultrafiltration (UF) | Reverse Osmosis (RO) |
|---|---|---|
| Removes turbidity and suspended solids | Yes | Yes (needs pre-treatment) |
| Removes bacteria and cysts | Yes | Yes |
| Removes dissolved salts (TDS) | No | Yes |
| Keeps natural minerals | Yes | No |
| Water recovery | Very high | Lower, produces reject |
| Operating pressure | Low | High |
If your water has acceptable TDS but is muddy or microbiologically unsafe, UF alone is often the right answer. If TDS is high, you need RO — and UF makes an excellent pre-treatment for it.
Where UF Plants Work Best
Safe Drinking Water with Minerals
For apartments, schools and institutions that receive Siruvani or other low-TDS supply water, UF provides safe, clear water while keeping the natural taste and minerals, with almost no water wasted.
Pre-Treatment for RO
UF before RO removes the fine particles and colloids that foul RO membranes. The result is longer membrane life, fewer cleanings and more stable output — especially when the feed is surface water, tanker water or treated effluent. See our industrial RO plants.
Wastewater Reuse
After an STP or ETP, UF polishes the treated water so it can be reused for flushing, cooling towers or as RO feed in recycling systems. Learn more about wastewater treatment and reuse.
Process Water
Food, beverage and pharma units use UF to remove bacteria and particles from process water without changing its mineral content.
Benefits of UF
- Removes bacteria, cysts and turbidity reliably
- No chemicals needed for routine treatment
- Very high water recovery with little waste
- Low operating pressure and power use
- Compact skid-mounted design
- Retains natural minerals and taste
Choosing the Right UF Capacity and Configuration
UF capacity depends on your daily water demand, peak flow and the quality of the feed water. Dirtier water needs a lower flux — more membrane area for the same output — to avoid rapid fouling. We also decide between inside-out and outside-in membranes, pressurised or submerged modules, and the type of pre-filter, based on your source.
For apartments and institutions, a compact skid with automatic backwash and a small treated water tank is usually enough. For RO pre-treatment and wastewater reuse, we design larger multi-train systems so one train can be cleaned while others keep running. Every configuration is chosen to give stable output without excessive cleaning.
Common UF Problems We Fix
When UF plants installed by others stop performing, the usual causes are skipped backwashes, no chemically enhanced backwash, missing pre-filtration, iron fouling or broken fibres. We inspect the plant, test the membranes, clean or replace modules and correct the control settings so the problem does not return.
Our UF Plant Design
Every plant starts with a water test, especially turbidity, organic content and iron. We then choose the membrane type, flux rate, backwash frequency and pre-filtration (such as disc or sand filters) to suit your water. Automatic backwash and CEB sequences are controlled by PLC, with pressure monitoring to show when cleaning is due. We also integrate UV or chlorination where final disinfection is needed.
Keeping UF Membranes Healthy
UF membranes are robust, but they need a routine. Regular backwash, chemically enhanced backwash and periodic integrity checks keep them productive. Our AMC service covers these tasks, along with pre-filter cleaning, chemical supply and membrane replacement when needed. We also service UF plants installed by other suppliers.
Areas We Serve
We install UF plants across Coimbatore — Saravanampatti, Peelamedu, RS Puram, Race Course, Vadavalli, Kalapatti, Singanallur, Thudiyalur, Kovaipudur, Sulur, Pollachi and Mettupalayam.
We also serve Chennai and build water treatment plants with UF in Karur, Tiruppur and Erode.
Find Out If UF Is Right for You
Send us your water source and daily requirement. We will test your water and tell you whether UF, RO or a combination is the right choice.