Desalination: Automated process is key to ensure energy efficiency

Are you looking to take energy costs out of your desalination process?

Constant variations in water quality, flux rates and fouling make it difficult to control pump pressure and keep energy use in check. Intelligent pump solutions from Grundfos can automatically monitor the entire process, connect directly to the overall process control and optimise osmotic pressure in real time. This ensures a controlled, reliable, energy-efficient desalination process.

With Grundfos iSOLUTIONS you can:

  • Reduce energy costs by up to 60%
  • Increase reliability with automatic pressure control
  • Ensure high product water quality
  • Stabilise your system and reduce downtime
  • Keep your membrane and your entire system running longer
  • Simplify your system design and reduce capital costs (smaller pumps and fewer components)  
  • Reduce labour and operational costs

Expertly tailored to your needs

When you choose Grundfos iSOLUTIONS, our desalination experts will work with you to tailor your pumps to the precise requirements of your desalination system and your overall process. You get a single point of contact for the design, installation and maintenance of your system.

Learn how automated pump control can make your desalination system more stable and energy efficient. Download our Desalination white paper.

The technical deep dive

Use pressure exchangers for energy recovery 

Did you know you can cut energy costs by up to 60% by harvesting the energy created from the high-pressure brine output? Using automated pressure exchangers, you can transfer energy directly from the brine water to the feed water, making the pressure exchangers a high-pressure pump for flow almost equal to the brine flow. 

  • The transfer losses are few, and the circulation pump delivers the compensation of pressure difference between brine and feed (3-4 bar)
  • The energy efficiency is around 96%
  • The equipment and maintenance costs are the same as systems using no pressure exchanger

The most efficient SWRO pump solution

To take full advantage of energy recovery, we recommend a solution that includes:   

  • A seawater feed pump
  • A booster pump  
  • An automated pressure exchanger
  • A turbine

Featuring pre-set operating points, Grundfos iSOLUTIONS pumps maintain constant pressure, offer precise ramp control and balanced flow. They offer superior efficiency, a small footprint and easy maintenance.

Why Grundfos iSOLUTIONS for your installation?

Our desalination experts can help you tailor a desalination system that precisely supports real-time system variations and pressure fluctuations. With unique experience and knowledge in the entire network surrounding a desalination system, we can help you achieve a long-lasting, optimised system that keeps energy costs down and reliability up. That’s desalination done the intelligent way.


Get 10% extra energy savings out of the box

Optimise your SWRO pump system with one of the world’s most efficient motors, the MGE with IE5 certification. They offer 10% energy savings and up to 25% reduction in payback time in controlled E-pumps compared to IE3-certified solutions.

Do you want to experience the benefits of extreme energy efficiency and outstanding pump performance? 

Find the best energy efficient pump fast

Calculating energy consumption can be time consuming but here you can find the most efficient pump easily. Click here to quickly and easily calculate, compare and evaluate pumps based on life-cycle costs.

Contact Grundfos

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