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Nano Filtration Systems

Advanced membrane technology for selective separation, softening, and purification of water

Capacity Range: 1 m³/hr to 500 m³/hr
200-1000 Dalton MWCO Operating Pressure: 5-20 bar Recovery: 75-90% CE & ISO Certified
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Nano Filtration Membrane System

NF Technology Overview

Bridging the gap between RO and UF for selective separation applications

Parameter Nano Filtration (NF) Reverse Osmosis (RO) Ultra Filtration (UF)
Pore Size 0.001 μm (1 nm) 0.0001 μm 0.01-0.1 μm
Molecular Weight Cut-off 200-1000 Da 100 Da 10,000-100,000 Da
Operating Pressure 5-20 bar 15-60 bar 1-5 bar
Salt Rejection 20-90% (divalent) 95-99% 0%
Organic Removal 90-99% 99% 10-90%
Energy Consumption Medium High Low

NF System Configurations

Custom designed systems for specific application requirements

Skid Mounted NF System

Standard
Capacity: 1-50 m³/hr Footprint: Compact Power: 380V, 3 Phase

Features: Pre-assembled, pre-wired, plug-and-play installation, ideal for industrial applications

Standard Components:

  • NF membrane elements (8" / 4")
  • SS 304/316 pressure vessels
  • High pressure feed pump
  • Multimedia/ Cartridge pre-filters
  • PLC control panel
  • Chemical dosing system
1 m³/hr 5 m³/hr 25 m³/hr 50 m³/hr

Containerized NF Plant

Mobile
Capacity: 50-200 m³/hr Mobility: ISO container Operation: Fully automatic

Features: Complete water treatment plant in a container, ideal for remote locations, emergency water supply

Included Systems:

  • Complete NF system
  • Pre-treatment (DAF/Clarifier)
  • Post-treatment (UV/Chlorination)
  • Chemical storage & dosing
  • Air conditioning
  • Generator backup
50 m³/hr 100 m³/hr 150 m³/hr 200 m³/hr

Two-Stage NF System

High Recovery
Recovery: Up to 90% Stages: 2:1 or 3:2:1 array Energy Recovery: Optional

Features: Maximizes water recovery, reduces concentrate volume, ideal for water-scarce regions

Advanced Features:

  • Inter-stage booster pumps
  • Energy recovery device
  • Concentrate recycle
  • Advanced PLC with SCADA
  • Online monitoring sensors
Custom Design

Hybrid NF-RO System

Integrated
Configuration: NF + RO Scaling Control: Reduced Energy Saving: 20-30%

Features: NF pretreatment for RO reduces scaling potential, lowers RO operating pressure, extends membrane life

System Integration:

  • NF for hardness removal
  • RO for complete demineralization
  • Shared pre-treatment
  • Unified control system
  • Optimized chemical dosing
Custom Design

NF Membrane Elements

Spiral wound polyamide composite membranes for various applications

NF-270 Element

Dow Filmtec
MWCO: 200-300 Da Hardness Rejection: >97% Max Pressure: 41 bar

Standard Test Conditions:

  • Flux: 23-27 LMH
  • NaCl Rejection: 40-60%
  • MgSO₄ Rejection: >97%
  • pH Range: 2-11
  • Max Temperature: 45°C
Applications: Water softening, color removal, organic reduction
4" x 40" 8" x 40"

NF-90 Element

Dow Filmtec
MWCO: 100-200 Da Salt Rejection: 85-95% Max Pressure: 41 bar

Standard Test Conditions:

  • Flux: 20-24 LMH
  • NaCl Rejection: 85-95%
  • MgSO₄ Rejection: >97%
  • pH Range: 3-10
  • Max Temperature: 45°C
Applications: Partial demineralization, TOC reduction, pesticide removal
4" x 40" 8" x 40"

ESNA1-LF2

Hydranautics
MWCO: 300 Da Low Fouling Max Pressure: 41 bar

Standard Test Conditions:

  • Flux: 25-30 LMH
  • NaCl Rejection: 50-70%
  • Hardness Rejection: >95%
  • pH Range: 3-10
  • Chlorine Tolerance: 1000 ppm-hrs
Applications: Surface water treatment, wastewater reuse, low fouling applications
4" x 40" 8" x 40"

Desal-5 DL

Koch
MWCO: 150-300 Da High Chlorine Tolerance Max Pressure: 41 bar

Standard Test Conditions:

  • Flux: 22-26 LMH
  • NaCl Rejection: 50%
  • MgSO₄ Rejection: 98%
  • pH Range: 4-11
  • Chlorine Tolerance: High
Applications: High chlorine environments, bleach plant effluents, textile wastewater
4" x 40" 8" x 40"

NF Applications

Selective separation for diverse industrial and municipal applications

Water Softening

Removal of hardness (Ca²⁺, Mg²⁺) without complete demineralization

Hardness removal: 90-98% TDS reduction: 20-70% Energy saving vs RO: 30-50%

Industrial Process Water

Partial demineralization for boiler feed, cooling tower make-up

Silica removal: 50-90% Organics removal: 90-99% Scale prevention

Food & Beverage

Concentration, demineralization, color removal in food processing

Dairy processing Juice concentration Sugar decolorization

Pharmaceutical

Purification of process water, solvent recovery, API concentration

Pyrogen removal Endotoxin reduction Process water polishing

Wastewater Reuse

Advanced treatment for municipal and industrial wastewater recycling

Color removal Organic removal Heavy metal removal

Municipal Water

Disinfection byproduct precursor removal, pesticide elimination

THM precursor removal Pesticide removal: 90-99% Nitrate reduction: 50-80%

Pretreatment Requirements

Essential pretreatment for optimal NF membrane performance and longevity

1

Particulate Removal

Protection against particulate fouling

Multimedia Filter Cartridge Filters (5-10 μm) SDI<15: <3
2

Chemical Conditioning

Scale and fouling prevention

Antiscalant Dosing pH Adjustment Biocide (if needed)
3

Chlorine Removal

Protection against membrane oxidation

Sodium Bisulfite (SMBS) Activated Carbon Filter Free Chlorine: <0.1 ppm
4

Temperature Control

Optimal operating conditions

Max Temperature: 45°C Heat Exchanger (if needed) Min Temperature: 5°C

Feed Water Quality Guidelines

Parameter Maximum Limit Recommended Test Method
Turbidity 1 NTU <0.5 NTU Nephelometric
SDI15 5 <3 ASTM D4189
Free Chlorine 0.1 ppm 0 ppm DPD method
Iron (Fe) 0.1 ppm <0.05 ppm Atomic Absorption
Manganese (Mn) 0.05 ppm <0.02 ppm Atomic Absorption
Silica (SiO₂) Variable Antiscalant dependent Colorimetric

NF System Components

High-quality components for reliable and efficient operation

High Pressure Pumps

Multistage centrifugal pumps for NF pressure requirements

Materials: SS 316 Pressure: 10-30 bar Frequency Drive: Optional

Pressure Vessels

Fiberglass reinforced plastic (FRP) or stainless steel vessels

Size: 4" / 8" diameter Pressure: 300/450 psi Elements per vessel: 1-6

Control Panel

PLC based automatic control with HMI touch screen

PLC: Siemens/Allen Bradley HMI: 7"/10" Touch Screen Communication: Modbus/ Ethernet

Chemical Dosing

Precision dosing pumps for antiscalant, acid, biocide

Pumps: Diaphragm type Control: Proportional to flow Tanks: HDPE/SS

Instrumentation

Online monitoring of pressure, flow, conductivity, pH

Pressure Transmitters Flow Meters Conductivity/pH Meters

Piping & Valves

Complete piping manifold with automated valves

Material: SS 304/316 Valves: Ball/Butterfly Automation: Solenoid/Pneumatic

NANO FILTRATION SYSTEM ENQUIRY

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Water Treatment Experts

+91 97116 23131

Email

info@kdstechnologies.in