Thin Film Flexible Nanofiltration Membrane Water Treatment Industrial Nanofiltration

Nanofiltration Membrane For Water Treatment

Product Overview

The Nanofiltration (NF) Membrane is an advanced membrane separation technology positioned between ultrafiltration (UF) and reverse osmosis (RO).
It features pore sizes of approximately 0.001 μm, enabling selective removal of multivalent ions, organic matter, and hardness-causing substances while allowing partial passage of monovalent ions such as Na⁺ and Cl⁻.
This selective separation capability makes NF membranes ideal for water softening, color removal, organic rejection, and partial desalination in both industrial and municipal applications.

Working Principle

Nanofiltration operates on a pressure-driven selective separation principle.
When feed water is pressurized, small molecules like water and monovalent ions pass through the membrane, while larger molecules, multivalent ions, and organic compounds are rejected.
The NF process achieves moderate salt rejection (typically 50–90%) and high organic rejection under lower operating pressures than reverse osmosis, offering both high efficiency and energy savings.

Main Components

• NF Membrane Sheet: Made of polyamide (PA) thin-film composite material with excellent selectivity and chemical resistance.

• Feed Spacer: Ensures uniform feed distribution and reduces concentration polarization.

• Permeate Carrier Layer: Supports stable water flow and minimizes pressure loss.

• Module Housing: Typically FRP or PVC, providing durability and corrosion resistance.

• End Caps & Connectors: Sealed design to ensure easy installation and reliable operation.

Features

• Selective Ion Rejection: Removes multivalent ions (Ca²⁺, Mg²⁺, SO₄²⁻) while allowing partial passage of monovalent ions.

• High Organic Removal: Effectively removes color, organic matter, and macromolecular contaminants.

• Low Operating Pressure: Achieves high permeate flux under lower pressure compared with RO membranes.

• Energy Saving: Reduced power consumption with stable operation and high recovery rate.

• Excellent Chemical Stability: Resistant to oxidation and compatible with standard cleaning chemicals.

• Anti-Fouling Design: Smooth membrane surface minimizes scaling and biofouling.

• Long Service Life: Durable polyamide composite structure ensures long-term performance stability.

• Flexible Integration: Fits standard 4040 and 8040 membrane housings for easy system retrofitting.

Applications

• Water Softening: Selective removal of hardness ions (Ca²⁺, Mg²⁺).

• Drinking Water Purification: Reduction of organic matter, color, and odor.

• Industrial Process Water: Pre-treatment for RO systems or high-quality process water production.

• Wastewater Reuse: Removal of organic and hardness contaminants in reclaimed water.

• Food & Beverage Industry: Concentration and purification of juices, dairy, and process water.

• Textile and Dyeing Industry: Color removal and reuse of process water.

Optional Configurations

• Membrane Material: Polyamide Thin-Film Composite (TFC)

• Pore Size Range: ~0.001 μm

• Operating Pressure: 100–600 psi (customizable)

• Salt Rejection Rate: 50–90% depending on feed composition

• Module Sizes: 4040, 8040, or customized

• Feed Type: Tap water (TWNF) / Brackish water (BWNF) / Industrial wastewater (IWNF)

• Housing Color: White, blue, or gray

• End Connections: Standard or customized fittings

     Jiangsu Sanhe Environmental Protection Group Co., Ltd., formerly Jiangsu Sanhe Environmental Protection Equipment Co., Ltd., is located on the scenic shores of Lake Taihu. It is a renowned manufacturer and developer of modern environmental protection and water treatment equipment in China. It comprises several subsidiaries, including Jiangsu Sanhe Environmental Engineering Co., Ltd. and Yixing Sanhe Environmental Protection Design Institute Co., Ltd. The parent company has a registered capital of 100.2 million yuan, a building area of ​​over 20,000 square meters, and a staff of 52 technicians. The company boasts not only strong environmental protection equipment production and R&D capabilities, but also a highly qualified team with over 30 years of experience in environmental protection equipment production and service, a passion for environmental protection, and a commitment to integrity.

     After nearly 30 years of continuous effort, our innovative development of new products, technologies, materials, and processes, along with our expertise, has been widely adopted in the industry. We have developed advanced continuous-flow activated carbon filters and differential fully automatic backwash filters specifically for reclaimed water reuse and zero-discharge projects. We have also independently developed high-efficiency activated carbon suitable for flow-through activated carbon towers, resolving challenges in China due to poor adsorption performance, short service life, saturation, and high operating costs, hindering widespread adoption and ensuring long-term effective use of activated carbon.

    ​Since its establishment, Jiangsu Sanhe Environmental Protection Group Co., Ltd. has provided qualified products and services to nearly a thousand renowned domestic and international manufacturers, including municipal sewage treatment plants, the machinery and chemical industry, CNPC, Sinopec, Baosteel Group, Jiangxi Copper Group, Dongfeng Nissan, Dongfeng Motor Corporation, commercial passenger vehicle companies, Hangzhou Luxgen, Great Wall Motors, Dongfeng Peugeot Citroen Automobile, Dongfeng Yangzijiang Bus, CSR Corporation, and the Tarim Oilfield, earning a strong reputation. We are grateful to all our friends who have given us opportunities and helped us grow!

     We firmly believe in down-to-earth and steady development; we advocate scientific innovation and unremitting pursuit; and we promote energy-saving, low-carbon, and green living. We provide our customers with ingenious products and services and strive to establish our company as a leading modern enterprise in China's environmental protection production, research, and development sectors.