Description
UF Membrane Retrofit & Upgrade Kit – Simple, Cost-Effective Solution for Existing Water Treatment Plants

Product Overview
Water treatment plants everywhere face the same pressures. Stricter water quality standards. Growing population demands. Aging infrastructure. Tight capital budgets. The ideal solution would be to build a new membrane plant—but that costs millions and takes years to get through planning, permitting, and construction.
There is a better way.
Instead of building new, you can upgrade existing. The DAGYEE UF Membrane Retrofit & Upgrade Kit allows plant operators to convert conventional sand filters, media filters, or clarifiers into modern UF membrane systems using the existing basins and infrastructure. No major civil works are required. No plant shutdowns for months. Just a targeted upgrade that delivers membrane-quality water at a fraction of the cost of a new plant.
This kit is designed for municipal water treatment plants, industrial wastewater facilities, and any existing plant that needs better performance without a complete rebuild. It's a practical, cost-effective solution for plant managers who need results now.
Why UF for Household Water?
Removes What Matters Most
Activated carbon filters remove chlorine taste and odor. Sediment filters remove sand and dirt. Neither of them reliably removes bacteria and viruses. UF does. The 0.01-0.02 micron pores are smaller than most bacteria and all viruses. It's a physical barrier—if it's bigger than the pore, it stays out.
No Chemicals
Unlike reverse osmosis systems that require pre-filters, post-filters, and sometimes remineralization, UF requires no chemicals. Just water pressure or gravity pushing water through the membrane.
No Electricity (Gravity Models)
The gravity-fed version operates without any electricity. It's ideal for remote areas, emergency preparedness, or locations with unreliable power. Fill the upper tank with water, and gravity pulls it through the membrane. Clean water collects in the lower tank.
Long-Life Membrane
The PVDF membrane has a service life of 3 to 5 years with proper maintenance. Compare that to carbon cartridges that need replacement every 3-6 months or RO membranes that require regular replacement and wastewater generation.
Preserves Beneficial Minerals
UF removes contaminants but leaves dissolved minerals in the water. This matters for taste and health—calcium, magnesium, and other minerals are retained. The water tastes natural and isn't "flat" like RO water.
Low Wastewater
UF systems produce very little wastewater (5-10% of feed). Compare that to RO systems that waste 3-4 liters for every liter of purified water produced. UF is water-efficient.
Compact and Simple
The system is small enough to fit under a sink or on a countertop. No complex installation is required. It connects to the existing water line or uses gravity feed.
How This System Works
Cost Savings
A retrofit typically costs 30-50% of a new membrane plant. You reuse existing basins, piping, pumps, and buildings. The investment goes only to what's new: membrane modules, control system, and minor piping modifications.
Speed
A retrofit can be designed, procured, and installed in 6-12 months. A new plant takes 2-3 years. For communities facing water quality violations or capacity constraints, speed matters.
Minimal Disruption
Installation occurs while the existing plant continues operating. The retrofit can be completed in phases or during scheduled shutdowns. No need to build temporary treatment capacity.
Proven Performance
UF membrane technology is well-established. Retrofitted plants achieve the same water quality as new membrane plants: < 0.1 NTU turbidity, > 99.99% bacteria removal, < 1 SDI.
Future-Proofing
Once the retrofit is complete, the plant is ready for even stricter future regulations. The UF membranes can be replaced with higher performance membranes as technology advances.
Environmental Benefits
Reusing existing infrastructure reduces the environmental footprint of the upgrade. Less concrete, less steel, less construction waste, less embodied carbon.
System Components

| Component | Function Description |
|---|---|
|
Core
|
Core filtration units; typically made of PVDF (Polyvinylidene Fluoride) or PES (Polyethersulfone), featuring excellent anti-fouling properties, high chemical resistance, and long service life. Available in inside-out or outside-in configurations. |
|
Feed Pump
Power
|
Provides stable operating pressure for the filtration process, typically ranging from 0.1 to 0.3 MPa. Designed for continuous duty with energy-efficient performance and low noise operation. |
|
Backwash System
Cleaning
|
Periodically flushes the membrane with clean water or an air-water combination in the reverse direction to effectively remove surface fouling, restore membrane flux, and extend membrane lifespan. |
|
Chemical Cleaning System
CIP/CEB
|
Utilizes chemical agents such as NaClO (sodium hypochlorite), citric acid, NaOH, and EDTA for online (CEB) or offline (CIP) chemical cleaning to remove irreversible fouling and fully recover membrane performance. |
|
PLC Control System
Automation
|
Equipped with advanced PLC and HMI touch screen interface, enabling fully automated operation including automatic filtration, backwashing, chemical cleaning, TMP monitoring, alarm diagnostics, and optional remote control. |
|
Pre-filtration System
Protection
|
Includes disc filters or cartridge filters with 100~200 μm filtration precision to remove large suspended particles and protect the UF membranes from mechanical damage and premature clogging. |
|
Air Scouring System
Enhanced
|
Generates air bubbles during backwashing to enhance cleaning efficiency by creating turbulence and mechanical scouring on the membrane surface, significantly improving foulant removal. |
|
Tank & Piping System
Infrastructure
|
Comprises feed tank, permeate tank, backwash tank, and chemical dosing tanks, all constructed from high-quality corrosion-resistant materials such as UPVC or Stainless Steel 304/316L, ensuring durability and hygienic operation. |
What This System Removes
The Compact UF System is a physical barrier. It removes anything larger than its pore size. Here's what that means in practical terms:
| Contaminant | Removal Efficiency | Notes |
|---|---|---|
| Suspended solids | > 99.9% | Sand, silt, clay, and other particulate matter |
| Colloids | > 99.9% | Clay particles, silica, iron oxides |
| Bacteria | > 99.99% | Including E. coli, coliforms, and pathogenic bacteria |
| Viruses | > 99.99% | Including enteric viruses and rotaviruses |
| Protozoa | > 99.99% | Giardia, Cryptosporidium |
| Turbidity | To < 0.1 NTU | Consistently low, regardless of feed turbidity |
| Algae | > 99.9% | Removes algae cells and algal debris |
What the System Does NOT Remove:
-
Dissolved salts (TDS)
-
Dissolved ions (sodium, calcium, chloride, etc.)
-
Low molecular weight organics
-
Color that is truly dissolved (not particle-bound)
For applications requiring dissolved solids removal, UF is typically followed by reverse osmosis or ion exchange. In fact, one of the most common uses of UF is as pretreatment for an RO system—it removes the particulates that would otherwise foul the RO membranes.
Technical Specifications

| Parameter | Specification |
|---|---|
| Filtration Precision | 0.01 ~ 0.02 μm |
| Membrane Material | PVDF (Polyvinylidene Fluoride) / PES (Polyethersulfone) |
| Membrane Configuration | Hollow Fiber (HFF) |
| Fiber Inner Diameter | 0.6 ~ 1.0 mm |
| Fiber Outer Diameter | 1.0 ~ 1.6 mm |
| Operation Mode | Inside-out / Outside-in |
| Operating Pressure | 1.4 ~ 3.5 bar (20 ~ 50 psi) |
| Maximum Operating Pressure | 6.0 bar (87 psi) |
| Operating Temperature | 2 ~ 38℃ (35 ~ 100℉) |
| Maximum Temperature | 45℃ (113℉) |
| Operating pH Range | 2 ~ 13 |
| pH Range (Cleaning) | 1 ~ 14 CIP |
| Recovery Rate | 85% ~ 95% |
| Permeate Turbidity | < 0.1 NTU |
| Permeate SDI | < 1 RO Feed |
| Bacteria Removal Rate | > 99.99% |
| Virus Removal Rate | > 99.99% |
| Chlorine Tolerance (PVDF) | > 2,000 ppm Continuous |
| Power Supply | 220V / 380V ± 10%, 50/60Hz, 3 Phase |
| Control System | PLC + HMI Touch Screen Fully Automatic |
| Protection Class | IP54 (Standard) / IP65 Optional |
Where This System Is Used
This compact UF system shows up in a wide range of applications. Here's where we most often see it installed:
| Application | Why It's Used | Typical Capacity |
|---|---|---|
| Village Water Supply | Provides safe drinking water for rural communities without complex infrastructure | 1-5 m³/h |
| Hotels & Resorts | Ensures consistent water quality for guests, protects plumbing and fixtures | 2-10 m³/h |
| Schools & Colleges | Produces safe drinking water for students and staff | 1-5 m³/h |
| Restaurants & Cafes | Provides high-quality water for cooking, beverages, and ice | 0.5-2 m³/h |
| Farms & Agriculture | Removes suspended solids for livestock drinking water or drip irrigation | 1-5 m³/h |
| Small Factories | Supplies consistent process water for food, beverage, and light manufacturing | 3-10 m³/h |
| RO Pretreatment | Protects downstream RO systems by removing particles and reducing SDI to < 1 | 1-10 m³/h |
| Campgrounds & Parks | Provides safe water for visitors in remote locations | 1-3 m³/h |
Installation & Setup
One of the advantages of the Compact UF System is its simplicity. Here's what you need to know:
What You Get
The system arrives fully assembled on a steel skid. All piping, the UF membrane modules, the feed pump, the control panel, and the instrumentation are already connected. The pre-filter is installed. The backwash system is plumbed. It's essentially plug-and-play.
Connection Requirements
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Water Supply: Pipe connection to your feed water source (well, tank, municipal supply, or surface water)
-
Permeate Discharge: Pipe connection to your product water tank or distribution system
-
Reject / Drain Discharge: Pipe connection to drain or recycle line (small flow, typically 5-10% of feed)
-
Power: Single-phase electrical connection at the specified voltage
-
Space: Level floor area sufficient for the skid, plus 600 mm access around all sides for maintenance
Commissioning
A trained technician can commission the system in one day. The process includes flushing the membrane modules, checking all instrumentation, programming the control parameters, and verifying performance. Operator training takes about 2-3 hours.
Operator Requirements
No specialized technical background is needed. The system is designed so that a facilities manager, maintenance person, or even a trained operator can handle the daily tasks. The checklist is simple: check pressures, monitor flow rates, top up chemicals if applicable, and call for service if something looks unusual.
Contact Us
The DAGYEE UF Membrane Retrofit & Upgrade Kit provides a practical path to better water quality and higher capacity for existing plants. It's a proven solution that saves money, saves time, and delivers membrane-quality water.
Contact our team for a free retrofitting feasibility assessment for your existing water treatment plant.

DAGYEE Water Technology
Safe drinking water for every home.