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Direct Nanofiltration membranes

Worldwide unique nanofiltration concept, designed to remove microplastics, pesticides, pharmaceuticals, and color from (waste) water

Our Direct Nanofiltration (dNF) membranes offer the unique combination of a low fouling hollow fiber configuration with the ability to remove organics and salinity (hardness) from water in one simple step. Other than a strainer, no further pre-treatment is required. We manufacture our membranes with a patented layer-by-layer process, where multiple nano-scale layers are deposited on a membrane support. This method enables very precise and controlled rejection and flux properties of the membrane. A unique solution for troubled water.

Applications
Our dNF membranes are the solution for color removal, COD/BOD removal, reclamation of cleaning solutions or coloring dye from water. Creating potable water directly from surface water, reclaiming industrial waste water, or removing medicine residues, microplastics and endocrine disruptors from waste water are areas where NX Filtration’s dNF membranes excel.
Product specifications
Our dNF modules provide an open, low fouling construction without obstruction by spacers as mostly used in other nanofiltration membranes. In addition, dNF modules can be backwashed. The robust chemistry allows continuous operation. Cleaning with chlorine and at very high or low pH are possible. Due to this chlorine tolerance, biofouling can be controlled for high fouling applications.
Projection Tool
Our third generation Projection Tool (NXPT 3.0) enables complete and robust system design for our dNF membranes and predicts the quality of permeate water produced. The tool was developed in-house combining expert modelling with extensive project experience. The detailed output information produced by NXPT 3.0 enables our customers to optimally design full-scale dNF systems.
Projection Tool
Filtration objective
Suspended solids and micro plastics
Bacteria
Viruses
Protein and colloidal silica
Micropollutants, color and nano plastics
Selective salts, softening and pharmaceuticals
Cut off
Typical Flux (l/m2h)
MgSO4 rejection (%)
Nano dNF
dNF40
dNF80
•
•
•
•
•
•
•
•
•
•
•
 
400Da
800Da
20-40
20-50
90
80
Ultra UF
UF010
UF150
•
•
•
•
•
•
•
 
 
 
 
 
10kDa
150kDa
50-100
50-100
n/a
n/a
Ultra products
Micro MF
MF100
MF500
•
•
•
•
 
 
 
 
 
 
 
 
100nm
500nm
25-100
25-100
n/a
n/a
Micro Products
Download product specification sheets

Case studies

  • Direct nanofiltration
    Pre-treatment for RO process at an aerospace multinational in Hungary
    View case
  • Direct nanofiltration
    Reuse and recycling of complex salty wastewater in Vietnam
    View case
  • Direct nanofiltration
    Removal of micropollutants from municipal wastewater after biological treatment
    View case

Contact

Robert Gerard
Water and wastewater expert
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