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Membrane cascades: A tool to enhance RO performances and overcome membrane ageing in desalination?

IWRA World Water Congress 2025 Marrakech Morocco
Water Security and Water-Related Risks
Author(s): Youness KOUZI, Fatima Zohra Charik, Saad ALAMI YOUNSSI, Murielle RABILLER-BAUDRY

Youness KOUZI (1,2), Fatima Zohra Charik (1,2), Saad ALAMI YOUNSSI (2), Murielle RABILLER-BAUDRY (1)

1. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, F-35000, Rennes, France
2. Laboratory of Materials, Membranes and Environment, Faculty of Sciences and Technologies of Mohammedia, Hassan II University of Casablanca, Morocco

December 3rd, 2025

Oral: PDF

Abstract

General motivation

  • The renewable freshwater availability per capita is estimated between 560 and 600 m³ per year, which is below the international threshold of 1,000 m³/year defining water scarcity.
  • In 2023, ⁓30% of counties are experiencing high and extremely high levels of water stress with Morocco ranks 27th .
  • In line with the “National Water Plan 2020–2050”, Morocco is progressively shifting from the exploitation of conventional water resources to the development of non-conventional resources, notably through treated wastewater reuse and seawater desalination.


Desalination is the process of removing dissolved salts from saline water (seawater or brackish water) to produce freshwater.

A sustainable approach to achieve independence from conventional water resources.