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Related Experiment Video

Updated: Jun 12, 2026

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
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Landfill Leachate Treatment by Using Second-Hand Reverse Osmosis Membranes: Long-Term Case Study in a Full-Scale

Raquel García-Pacheco1,2, Albert Galizia1, Sergi Toribio1

  • 1LEQUIA, Institute of the Environment, University of Girona, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain.

Membranes
|November 24, 2022
PubMed
Summary

Second-hand reverse osmosis (RO) membranes can effectively treat landfill leachate (LFL). This study demonstrates their reuse and regeneration as a sustainable, cost-effective alternative to disposal, promoting a circular economy.

Keywords:
aged membranescircular-economyend-of-lifelandfill leachatelife spanregenerationreusereverse osmosissecond-hand membranessustainability

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Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Membrane Science

Background:

  • Landfill leachate (LFL) presents complex treatment challenges due to its diverse composition.
  • Current membrane technologies for LFL treatment face limitations, including frequent and costly membrane replacement.
  • Disposal of end-of-life membranes represents an economic and environmental burden.

Purpose of the Study:

  • To assess the feasibility of reusing second-hand reverse osmosis (RO) membranes for landfill leachate treatment.
  • To evaluate direct reuse and regeneration methods for end-of-life RO membranes from desalination plants.
  • To demonstrate the application of repurposed membranes in an industrial LFL treatment setting.

Main Methods:

  • End-of-life RO membranes were sourced from a seawater desalination plant.
  • Membranes underwent testing with brackish water, followed by direct reuse or regeneration.
  • Laboratory-scale tests treated ultrafiltered LFL, and a long-term industrial-scale facility trial was conducted.

Main Results:

  • Second-hand RO membranes successfully treated LFL, meeting required water quality standards.
  • The industrial plant operated for 27 months using repurposed membranes.
  • The process demonstrated reduced energy requirements, including lower transmembrane pressure and higher recovery rates.

Conclusions:

  • Direct reuse and regeneration of second-hand RO membranes are viable alternatives for LFL management.
  • This approach offers significant economic and environmental benefits, aligning with circular economy principles.
  • Repurposing membranes reduces waste and enhances the sustainability of LFL treatment processes.