scroll

Direct Nanofiltration membranes

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

Our Hollow Fiber Nanofiltration (HFNF) membranes offer the unique combination of a low fouling hollow fiber configuration with the ability to remove organics and salinity (hardness) from water. Other than a strainer or sand filtration, 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
NX Filtration Projection Tool is an intuitive, online platform that enables the rapid and iterative system design for our dNF membranes and provides an estimation of the rejection of key components like TOC (Total Organic Carbon), COD (Chemical Oxygen Demand), BOD (Biological Oxygen Demand) and ion composition in the permeate and concentrate streams. Furthermore, it provides an estimation of rejections of several micropollutants, including PFAS, as well as other organic molecules.
Filtration objective
Suspended solids and turbidity
Bacteria
Viruses
Protein, colloidal silica and nano plastics
Micropollutants, color, humic acids and selective PFAS
Selective salts, partial softening and PFAS
Cut off
Typical Flux (l/m2h)
MgSO4 rejection (%)
Nano dNF
dNF40
dNF80
 
400Da
800Da
12-25
15-30
>91
>76
Ultra UF
UF010
UF150
 
 
 
 
 
10kDa
150kDa
30-60
50-100
n/a
n/a
Micro MF
MF100
MF500
 
 
 
 
 
 
 
 
100nm
500nm
40-80
40-80
n/a
n/a
Download product specification sheets

Case studies

  • Direct nanofiltration
    REGAIN consortium partners with NX Filtration to demonstrate municipal wastewater reuse
    View case
  • Direct nanofiltration
    IWE paper industry starts demo plant for sustainable water re-use
    View case
  • Direct nanofiltration
    Removal of micropollutants from municipal wastewater after biological treatment
    View case

Contact

Robert Gerard
Water and wastewater expert
Do you share our passion for innovative membrane technology? View our Job openings!