TECHNOLOGY

The Variable Leverage Pump

A wave-energy-powered pressure source that drives reverse osmosis desalination — producing clean water continuously, without grid power or fuel.

HOW IT WORKS

From ocean wave to drinking water

The BlueDesal system harvests the mechanical energy in ocean waves and converts it directly into the high pressure required to push seawater through a reverse osmosis membrane — producing WHO-quality drinking water with no external power source.OceanWavesVariableLeveragePump (VLP)High-PressureSeawaterRO Membrane+ Post-treatmentPotable Water75,000 L/dayper moduleBrine discharge (managed)

1 — Wave capture

The Variable Leverage Pump is a nearshore or offshore device that uses the rise and fall of ocean waves as its mechanical input. Unlike turbine-based wave energy converters, the VLP uses leverage rather than rotation to generate high pressure directly, with fewer moving parts and no electrical generation step between wave energy and water pressure.

2 — Pressure generation

Wave motion drives the pump mechanism, producing the sustained high pressure (typically 55–80 bar for seawater) required to force seawater through a reverse osmosis membrane. Pressure output is designed to remain useful across a range of sea states, not only peak wave conditions.

3 — Reverse osmosis

Pressurised feedwater passes through a semi-permeable RO membrane. Salt, minerals, and microorganisms are rejected; purified permeate advances to post-treatment. The system uses industry-standard SWRO membrane elements, ensuring access to established replacement supply chains and quality-assured performance data.

4 — Post-treatment and delivery

Product water undergoes remineralisation, pH adjustment, and disinfection before delivery to the distribution network. Final water quality is designed to comply with WHO Drinking Water Guidelines and applicable national standards. A monitoring and control system logs water quality continuously.