Low-Energy Desalination
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This September 2025 Cypris research brief provides a comprehensive, evidence-based comparison of low-energy desalination technologies as alternatives to conventional reverse osmosis, drawing on peer-reviewed literature from 2015–2025. It catalogs eight approaches — from forward osmosis and membrane distillation to electrodialysis and capacitive deionization — benchmarking each against RO baselines on energy consumption, water recovery, fouling susceptibility, and operational robustness. The report concludes with a stack-ranking of approaches to guide near-term technical decision-making for product development teams and water industry professionals.
What You'll Find in the Report
Why "low-energy" desalination means very different things depending on your water source
The 2 kWh/m³ threshold used to define low-energy desalination is near best-in-class for seawater but only moderate for brackish water — and most large-scale systems still fall above it. Understand how salinity, recovery targets, and feed conditions determine which technologies can realistically achieve low-energy operation and where the true performance gaps lie.
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Which alternative technologies are ready to deploy and which still need development
From commercially mature electrodialysis and energy recovery devices to still-nascent capacitive deionization and batch RO configurations, the readiness of these technologies varies widely. Learn where each approach sits on the technology readiness scale and what barriers — cost, scalability, or operational complexity — stand between promising pilots and real-world deployment.
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How renewable energy integration could be the key to unlocking true low-energy desalination
Technologies like membrane distillation and forward osmosis appear energy-light on electricity alone, but their system-level totals rise sharply once thermal energy requirements are counted. Discover why pairing these approaches with solar thermal or waste heat sources isn't just beneficial — it may be the decisive factor in making them genuinely competitive with RO at scale.
Powering world-leading R&D & IP teams
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