ULP32-4021 Anti-fouling Ultra Low Pressure RO Membrane for Brackish Water Treatment
Introduction:For commercial and light industrial water treatment projects facing frequent membrane fouling and high energy consumption, we provide complete pre-filtration solutions including high-precision Liquid Filters and fully automatic Self Cleaning Filter to stabilize raw water quality and extend RO membrane service life. The ULP32-4021 anti-fouling ultra-low pressure RO membrane is a newly upgraded optimized element in the ULP series, specially developed for medium and low TDS brackish water, surface water, and slightly polluted well water environments. Different from standard low-pressure RO membranes that are prone to organic and microbial fouling, this model adopts modified hydrophilic anti-fouling membrane formula, achieving stable high salt rejection and high water flux under ultra-low operating pressure. With a compact 4021 size design, it perfectly fits small skid-mounted water purification systems, effectively reducing operational energy consumption and chemical cleaning frequency for long-term water treatment projects.
We're here to help:
Easy ways to get the answers you need.
Product parameter:
Product Introduction
The ULP32-4021 anti-fouling ultra-low pressure RO membrane is a specialized energy-saving and pollution-resistant membrane element designed to solve the common pain points of traditional small-size RO membranes, such as easy fouling, fast flux attenuation, and high maintenance costs. As an upgraded version of the conventional ULP31-4021 model, this membrane optimizes the surface roughness and hydrophilic molecular structure, significantly improving tolerance to organic pollutants, colloidal sediments and microbial slime in raw water. To maintain long-term stable operation and maximize anti-fouling performance, supporting pretreatment systems composed of Liquid Filters and Self Cleaning Filter are highly recommended to remove large particles, suspended solids and impurities in advance, avoiding irreversible membrane surface contamination. Adopting a standard 4-inch × 21-inch compact structure, it fills the market gap of anti-fouling membrane elements between 2540 small membranes and 4040 large membranes. It can directly replace ordinary imported 4021 RO membranes without equipment modification, providing a more durable and cost-effective solution for small and medium-sized commercial water treatment projects.
Product Overview
In practical commercial water treatment operations, most brackish water and well water contains trace organic matter, bacteria, colloids and turbidity substances, which easily cause fouling, flux decline and shortened service life of ordinary low-pressure RO membranes. The ULP32-4021 anti-fouling ultra-low pressure RO membrane is developed for such complex water quality working conditions. It adopts a new generation of polyamide thin-film composite technology with hydrophilic modification treatment on the membrane surface, which greatly reduces the adhesion force of pollutants and inhibits the growth and accumulation of biofouling. While maintaining the ultra-low pressure energy-saving advantage of the ULP series, it significantly enhances the system’s tolerance to fluctuating water quality. Compared with ordinary 4021 RO membranes, it has longer cleaning cycles, lower attenuation rate of water yield and desalination rate, and stronger operational stability. It is widely applicable to various decentralized small-scale water purification equipment and is a high-quality alternative to imported anti-fouling low-pressure membrane elements.
Working Principle
The ULP32-4021 anti-fouling ultra-low pressure RO membrane follows the pressure-driven reverse osmosis separation principle. Under stable ultra-low system operating pressure, raw brackish water flows uniformly along the membrane surface. The high-density polyamide active interception layer can accurately trap dissolved salts, calcium and magnesium ions, organic macromolecules, colloidal particles and microbial pollutants in the raw water, allowing only pure water molecules to pass through to form high-purity permeate water. Optimized nano-level smooth hydrophilic membrane surface effectively prevents salt crystal deposition and organic fouling accumulation. Combined with front-end graded pretreatment protection of Liquid Filters and Self Cleaning Filter, it controls feed water SDI within the standard range, eliminates most particulate pollutants, further reduces the membrane fouling rate, and ensures that the membrane element maintains stable water production and desalination performance during long-term continuous operation.
Technical Specifications
Item | Parameter |
|---|---|
Product Model | ULP32-4021 Anti-fouling Ultra Low Pressure RO Membrane |
Membrane Type | Modified Hydrophilic Anti-fouling Brackish Water Membrane |
Product Dimension | 4.0 inch × 21 inch |
Effective Membrane Area | 33 sq.ft |
Nominal Water Flux | 1100 GPD |
Stable Salt Rejection Rate | ≥99.2% |
Standard Test Pressure | 100 psi (0.69 MPa) |
Max Operating Pressure | 300 psi (2.07 MPa) |
Max Feed Water TDS | 5000 ppm |
Operating Temperature | 5℃ – 45℃ |
Working pH Range | 2 – 11 (Acid and alkali resistant for regular cleaning) |
Feed Water SDI Requirement | ≤3 |
Core Advantages
1. Ultra-low pressure energy-saving operation:
Optimized low-resistance membrane structure realizes efficient water production and desalination under ultra-low driving pressure, effectively reducing high-pressure pump load, saving 20%-30% system power consumption, and lowering long-term operating costs.
2. Professional anti-fouling hydrophilic performance:
Upgraded modified membrane surface greatly reduces the adhesion of organic matter, colloids and biological slime. It effectively resists common fouling problems in brackish water treatment and extends the stable operation cycle.
3. High and stable desalination efficiency:
Maintains a stable salt rejection rate of 99.2%, continuously and effectively removes dissolved salts, heavy metal ions and harmful impurities in well water and surface water, ensuring stable pure water quality output.
4. Strong water quality adaptability:
It can adapt to slightly polluted raw water and fluctuating water quality conditions that ordinary low-pressure membranes cannot tolerate, with low performance attenuation and strong operational stability.
5. Universal compatibility and high cost performance:
Standard 4021 industry size, fully compatible with all mainstream 4-inch membrane pressure vessels, plug-and-play replacement. It has comprehensive advantages over imported membranes in price, delivery and after-sales service.
Application Scenarios
Medium and small commercial brackish water and underground well water purification projects
Slightly polluted surface water treatment and municipal tap water deep purification systems
Light industrial factory auxiliary pure water and cleaning water preparation
Compact skid-mounted RO water treatment equipment and mobile water purification devices
Small-scale food, beverage and daily chemical production water treatment systems
Water treatment projects with long-term continuous operation and high anti-fouling requirements
FAQ
Q1: What is the difference between ULP32-4021 and ordinary ULP31-4021 membrane?
A1: ULP32-4021 is an anti-fouling upgraded version. It adopts hydrophilic modified material, which is more resistant to organic fouling and biological pollution. It is more suitable for raw water with slightly high turbidity and organic content than ordinary ultra-low pressure membranes.
Q2: Is this membrane suitable for long-term continuous operation?
A2: Yes. With stable ultra-low pressure operation and excellent anti-fouling performance, it can run continuously for a long time. Cooperated with Liquid Filters and Self Cleaning Filter pretreatment, it can maintain stable performance for a long time.
Q3: What pretreatment is essential for ULP32-4021?
A3: It is necessary to configure multi-stage precision pretreatment equipment includingLiquid Filters and Self Cleaning Filter to control feed water SDI≤3, reduce particulate and organic pollutants, and protect the anti-fouling membrane layer.
Q4: Can ULP32-4021 replace imported 4021 RO membrane directly?
A4: 100% compatible in size and performance parameters, no need to modify the original equipment and pipeline system, realizing fast replacement and stable commissioning.
Q5: What is the service life of this anti-fouling membrane?
A5: Under standard pretreatment and regular chemical maintenance, the service life can reach 2–3 years, and the water flux and desalination rate remain stable with low attenuation.
Related Products
Anti‑Fouling RO Membrane for Wastewater Reuse Treatment
High Salt Rejection RO Membrane for Brackish Water Treatment
Custom Reverse Osmosis Membrane for Water Treatment Solution
Low Pressure RO Membrane for Commercial Water Treatment Unit
Please fill in your procurement needs and contact information
