RO 2000 TDS Membrane

Product Overview

The RO 2000 TDS Membrane from the ULP (Ultra-Low Pressure) Series is engineered for brackish water and low-salinity feedwater up to 2,000 ppm TDS.
It provides high salt rejection, lower operating pressure, and significant energy savings, making it ideal for industrial and commercial water treatment systems operating in regions with moderately saline water sources, such as:

• Middle East
• South Asia
• Africa
• Southeast Asia
• Latin America
• Coastal or urban municipal water plants

Built with advanced aromatic polyamide composite technology, this membrane delivers maximum permeate flow at two-thirds of the pressure required by standard RO elements.
This helps reduce:

✔ Energy consumption
✔ Pump load
✔ System maintenance
✔ Overall OPEX

The membrane is widely used for treating groundwater, surface water, municipal water, and pre-treated industrial feedwater, offering excellent performance in long-term RO operation.

 

Key Features

1. Ultra-Low Pressure Operation

Requires significantly lower operating pressure than conventional brackish water membranes, reducing energy usage by up to 30–40%.

2. High Salt Rejection (Up to 99.5%)

Provides consistent permeate quality even when feed TDS fluctuates near the 2000-ppm range.

3. Designed for 2000-ppm Applications

Ideal for brackish water, industrial well water, surface water, and municipal water sources.

4. Lower System Investment

• Reduced pressure means:
• Smaller pumps
• Lower piping & vessel ratings
• Lower power and maintenance costs

5. Strong Fouling & Scaling Resistance

ULP membrane sheets offer excellent resistance against fouling caused by:

• Iron
• Silica
• Organics
• Microbiological load

6. Easy Integration

Compatible with all standard 2.5", 4", and 8" RO pressure vessels, making upgrades and replacements simple.

 

Technical Specifications (ULP Series – RO 2000 TDS Membrane)

Model	Membrane Area ft² (m²)	Permeate Flow GPD (m³/d)	Salt Rejection (%)	Min. Rejection (%)
ULP-2521	14 (1.3)	300 (1.13)	99.0	98.5
ULP-2540	30 (2.8)	750 (2.84)	99.0	98.5
ULP-4021-HR	36 (3.3)	850 (3.2)	99.4	99.0
ULP-4021-HF	36 (3.3)	1000 (3.8)	99.0	98.5
ULP-4040-HR	90 (8.4)	1900 (7.2)	99.4	99.0
ULP-4040-HF	90 (8.4)	2400 (9.1)	99.0	98.5
ULP-8040-HR	400 (37.2)	10000 (37.8)	99.5	99.0
ULP-8040-HF	400 (37.2)	11200 (42.3)	99.0	98.5

 

Test Conditions:

Pressure: 100 psi (0.69 MPa)

Temp: 25°C

NaCl: 500 ppm

pH: 7.5

 

 

How to Choose the Right RO Membrane Based on Feedwater TDS?

Selecting the correct RO membrane depends heavily on the TDS (Total Dissolved Solids) level of your feedwater. Using the wrong membrane can lead to low permeate quality, high operating pressure, increased power consumption, frequent fouling, and reduced membrane life.
Below is a clear guideline to help you choose the correct membrane type for different salinity ranges:

1. TDS ≤ 2,000 ppm - Choose ULP Series (Ultra-Low Pressure RO Membrane)

Recommended For:

• Light brackish water
• Groundwater with mild salinity
• Municipal/feedwater with low ionic load

Why ULP?

• Requires the lowest operating pressure
• Saves 30–40% energy
• Designed for stable operation in 500–2000 ppm range

Typical Use Cases:
Industrial RO systems, beverage plants, agriculture, rural desalination, hotels, commercial RO plants.

 

2. TDS 2,000–5,000 ppm - Choose LP Series (Low-Pressure Brackish RO Membrane)

Recommended For:

• Medium-salinity brackish water
• Desert groundwater with high minerals
• Industrial feedwater after pretreatment

Why LP?

• Better salt rejection at medium TDS
• Balanced pressure (higher than ULP, lower than normal BWRO)
• Better fouling resistance

Typical Use Cases:
Factories, food processing, boiler feedwater, urban desalination, water reuse systems.

 

3. TDS 5,000–20,000 ppm - Choose SW Series (Seawater RO Membrane)

Recommended For:

• High-salinity brackish water
• Coastal regions
• Industrial wastewater with high ionic concentration

Why SW?

Designed for high osmotic pressure

• High rejection (up to 99.7%)
• Withstands seawater-level salinity

Typical Use Cases:
Seawater desalination plants, offshore platforms, island water supply, petrochemical RO systems.

 

4. TDS ≥ 20,000 ppm - Custom-Engineered System Required

For very high-salinity feedwater, especially above 20,000–35,000+ ppm, membrane selection must be based on system design by an engineer.

Why Custom Design?

• Osmotic pressure becomes extremely high
• Multi-stage RO or hybrid technologies may be needed
• Requires customized energy recovery devices, antiscalant programs, and pressure ratings

Possible Solutions:

• High-pressure SWRO
• Two-stage SWRO
• SWRO + Brine Concentrator
• RO + EDR/MF/UF hybrid designs

 

Typical TDS Levels by Region

• Middle East: 5,000–20,000 ppm (SWRO needed)
• Southeast Asia: 500–3,000 ppm (ULP / LP wide coverage)
• Africa: 300–6,000 ppm depending on region
• South America: 200–2,000 ppm for most cities
• North America: 200–1,500 ppm for municipal networks

 

Customer Case – Saudi Arabia 2000 TDS Brackish Water Project

A client from Saudi Arabia required a stable RO system for well water with a TDS of ~1800–2000 ppm.
The project included:

• 8× 8040 ULP Series RO Membranes
• Production capacity: 80–90 m³/day
• Operating pressure: 8–10 bar
• Salt rejection: ≥99.4%
• Energy reduction: ~35% compared to standard BWRO membranes

The client highlighted:

"The ULP 2000 TDS membranes reduced our operating pressure significantly. Stable water quality, lower power cost, ideal for Middle Eastern groundwater."

 

 

 

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