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Making waves: Conceptualization of seawater-augmented potable reuse.

Bana H Dahdah1, Kelly M Conway1, Andrew Salveson2

  • 1Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, 3620 S. Vermont Avenue, Los Angeles, CA 90089, USA.

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Summary

This study introduces seawater-augmented potable reuse, integrating seawater into water reuse facilities to increase supply without major infrastructure changes. This approach mitigates risks associated with separate desalination and reuse projects.

Keywords:
Advanced treatment processesDemand riskIntegrated systemPotable water reuseSeawater desalinationSeawater pretreatmentSupply risk

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Area of Science:

  • Environmental Engineering
  • Water Resources Management
  • Chemical Engineering

Background:

  • Growing water scarcity necessitates innovative solutions for potable water supply.
  • Coastal regions face unique challenges combining wastewater reclamation and desalination.
  • Existing potable water reuse facilities can be enhanced to incorporate seawater.

Purpose of the Study:

  • To present the novel concept of seawater-augmented potable reuse for coastal facilities.
  • To conceptualize treatment trains for indirect and direct potable reuse scenarios.
  • To assess the integration of seawater into existing advanced water purification processes.

Main Methods:

  • Conceptualization of four treatment trains for potable water reuse.
  • Integration of seawater from three intake types into existing facilities.
  • Analysis of seawater pretreatment requirements based on quality and intake type.

Main Results:

  • Seawater augmentation can increase water supply at coastal facilities with minimal infrastructure.
  • Existing advanced water purification processes can be utilized effectively.
  • Pretreatment needs vary based on seawater quality, intake method, and facility processes.

Conclusions:

  • Seawater-augmented potable reuse offers a viable strategy to enhance water supply and reduce project risks.
  • Further laboratory and pilot testing are essential for validation.
  • Collaboration between water, wastewater, and desalination industries is crucial for implementation.