A Large Aerospace Manufacturer Cuts Wastewater Disposal Costs and Reduces OPEX by $49,000 Per Year with i2m CERA~DUR Filtration Technology

Project Overview

A large aerospace manufacturer needed to reduce OPEX at their location in Singapore. The abrasive composition of the wastewater resulted in the complete replacement of their existing polymer membrane solution every 2 months. Additionally, they needed to more effectively concentrate the wastewater to reduce disposal costs.


  • Eliminate wastewater surcharges
  • Reduce membrane replacement costs
  • Provide high quality permeate which would meet Singapore’s stringent disposal requirements.


Due to the highly abrasive nature of the wastewater they were replacing their polymer membranes every 2 months • Singapore’s effluent discharge standards are extremely strict.

Technology and Operating Conditions

  • Product: 25 CERA~DUR 2 Series Modules

  • Pore Size (D90): 10nm

    • Feed Water Rate: 6-8 m3 per day

    • Transmembrane Pressure: 1 Bar

    • Average Flux

      Water Parameters

      Feed Water

      • >5,000 (ppm)
      • >3,000 (ppm)
      • >200 (ppm)


      • <1 (ppm)
      • <500 (ppm)
      • <5 (ppm)


      With OPEX continuing to rise and operating efficiency declining due to constantly replacing polymer membranes, the client needed a more efficient wastewater treatment solution. With i2m’s innovative CERA~DUR ultrafiltration (UF) technology, the aerospace manufacturer was able to reduce their monthly disposal wastewater volume by 75%. Also, by replacing the existing polymer membranes with the i2m CERA~DUR ceramic hollow fiber membranes the client completely eliminated membrane replacement cost for the remainder of the project. (2014 – 2016). We also successfully met the discharge requirements with 100% retention of suspended solids and a permeate water containing less than 1 ppm TSS and less than 5 ppm of oil and grease.




      Reduced monthly wastewater volume by 75%







      No membrane replacements for entire length of project.



      Reduced overall OPEX by $49K per year.