Nanofiltration

Precision Filtration with Powerful Selectivity

Nanofiltration (NF) is an advanced membrane filtration technology that bridges the gap between ultrafiltration and reverse osmosis. Utilizing semi-permeable membranes with pore sizes ranging from 0.001 to 0.01 microns, NF effectively removes divalent and multivalent ions, organic molecules, and viruses, while allowing monovalent salts like sodium and chloride to pass through. This selective filtration makes Nanofiltration ideal for applications requiring partial demineralization, organic compound removal, and water softening.

What does Nanofiltration Remove?

Nanofiltration effectively removes a range of contaminants while allowing certain dissolved salts to pass through. Specifically:

  • Divalent ions (e.g., calcium, magnesium – water hardness)
  • Organic molecules
  • Viruses and some bacteria
  • Color, tannins, and turbidity
  • Total organic carbon (TOC)
  • Larger dissolved solids
  • Some pesticides and pharmaceuticals

Customized for Superior Water Treatment

Every system starts with a thorough analysis of your raw water source. Our experienced design and manufacturing teams carefully evaluate the contaminants present to determine the optimal system configuration. Energy usage, installation, and operating costs are all carefully balanced—without ever compromising water quality.

Our commitment: Uncompromised water quality, user-friendly operation, and complete customer satisfaction.

Whether you need a single-pass or double-pass system, multi-media filtration, carbon filtration, UV disinfection, or other advanced treatment options, we work closely with you to design a complete, tailored water treatment solution.

Benefits of an ALSI Nanofiltration System

  • Selective Ion Removal – Effectively removes hardness-causing ions like calcium and magnesium, making it ideal for water softening applications.
  • Energy Efficiency – Operates at lower pressures compared to reverse osmosis, resulting in reduced energy consumption.
  • Versatility – Suitable for a wide range of applications, including water purification, food and beverage processing, and pharmaceutical manufacturing.
  • High Permeate Flux – Provides a high flow rate of purified water, enhancing overall system efficiency.
How Can ALSI Support Your Goals?
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Designed for Versatility

ALSI Nanofiltration Systems are used to meet the demanding water quality standards of various industries:

  • Water & Wastewater Treatment – Removes organics, color, TOC, and hardness from surface and well water.
  • Food & Beverage – Concentrates and purifies sugars, salts, and dairy proteins.
  • Pharmaceuticals – Purifies compounds and concentrates active ingredients.
  • Chemical Processing – Enables chemical recovery and recycling.
Made for the Real World

Beyond performance, ALSI systems are designed to endure. Whether operating in tough industrial settings or continuous-use applications, our filtration solutions offer:

  • Long-term, uninterrupted reliability in harsh conditions
  • Stable, consistent throughput with minimal performance loss over time
  • Reduced downtime and service interruptions
  • Extended protection for downstream systems and sensitive equipment
  • Lower total cost of ownership through efficient, lasting design