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Water Treatment for Hydrogen Production with EnviroFALK

Our water treatment systems supply high-efficiency electrolysis plants with ultrapure water. Since ultrapure water is essential for water electrolysis technology, it plays a crucial role in the production of green hydrogen.

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Christopher Lenz
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Expertise Across the Entire Hydrogen Production Value Chain

Ultrapure Water Production

The treatment of drinking water into high-purity water for electrolysis is carried out in multiple process stages and combinations, depending on the feed water quality. Precision engineering from the very beginning.

  • Pre-filtration (e.g., backwash filters, sand filters, activated carbon & ultrafiltration)
  • Water softening systems (alternatively with antiscalant dosing)
  • Desalination >99% via reverse osmosis CO₂ removal using membrane degassing
  • Full deionization via electrodeionization (CEDI) or a second RO stage
  • Storage and distribution of high-purity water via a downstream buffer tank
  • Polisher – innovative plug-&-play system for easy replacement
  • TOC treatment (optional)

Efficient Recirculation Purification

Maintaining water quality within PEM electrolysis systems requires efficient recirculation purification. This process removes ions released during electrolysis, such as metal ions and fluoride, using a dedicated recirculation purification system.

  • Process water cooling unit (optional)
  • Ultrapure resin polisher for continuous desalination to <0.1 µS/cm
  • Particle filtration <1 µm Plug & Play system for quick polisher replacement
  • Degassing unit for residual removal of H₂ and O₂ (optional) Modular system solutions

The right water treatment for every electrolysis process

Each electrolysis process has specific requirements for water quality. With our extensive expertise, we develop customized solutions for efficient and reliable water treatment, perfectly tailored to your process.

Alkaline Elektrolysis (AEL)

In alkaline electrolysis (AEL), a potassium hydroxide solution (20–40% KOH) serves as the electrolyte. When an electrical voltage is applied, water at the cathode is split into hydrogen and hydroxide ions (OH⁻). The OH⁻ ions migrate to the anode, where they react to form oxygen and water. This process is ideal for sustainable hydrogen production.

Proton Exchange Membrane Electrolysis (PEM)

The proton exchange membrane (PEM) serves as the electrolyte and enables precise hydrogen production. Unlike AEL, where both electrodes are immersed in the electrolyte, PEM electrolysis supplies water only to the anode. There, water is split into oxygen and H⁺ protons. These protons migrate through the membrane to the cathode, where they combine with electrons to form pure hydrogen.

Anion Exchange Membrane Electrolysis (AEM)

AEM Electrolysis operates similarly to AEL, using a potassium hydroxide solution (approx. 1% KOH) as the electrolyte. When an electric voltage is applied, water molecules migrate through the membrane to the cathode, where they are reduced to hydrogen and hydroxide ions (OH⁻). The OH⁻ ions return to the anode, where they release oxygen.

Optimal Recirculation Purification for Sustainable Hydrogen Production

EnviroFALK PharmaWaterSystems provides advanced technologies for water treatment and recirculation, ensuring consistently highest quality standards.

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Are you looking for a water treatment solution for your specific electrolysis process?
You can have it. Whether ultrapure water recirculation systems that sustainably keep treated water in the cycle, pure water systems for fresh water replenishment, or a combination of both – we design the water treatment solution precisely tailored to your electrolysis process.
Do you have the highest demands for ultrapure water quality in your electrolysis process?

So do we! Optimally coordinated process combinations, such as softening, reverse osmosis, electrodeionization (EDI), or ion exchange, ensure consistently high ultrapure water quality, enabling smooth hydrogen production.

For electrolysis, do you need not only ion exchangers for complete water demineralization but also a professional regeneration service?
Deionized Water for Electrolysis Processes is often treated using ion exchangers. However, even the best ion exchange resin—which enables complete water demineralization inside the ion exchange cartridge—eventually becomes exhausted.

EnviroFALK provides professional regeneration of ion exchange resins at our in-house regeneration stations across Germany. Our state-of-the-art technology and internal water recirculation systems ensure sustainable operations.

What makes us unique?

We don’t just mix and regenerate resins together. Instead, we regenerate ion exchange resins separately, sorted by industry and application in dedicated resin pools—ensuring the highest water quality!

Are you considering setting up your own regeneration station exclusively for ion exchanger treatment in electrolysis processes?

Benefit from unmatched planning expertise. EnviroFALK is part of the EnviroWater Group, a network of companies with experts in sustainable water treatment and water processing.

Would you like expert advice?

Then you’ve come to the right place! The experts at EnviroFALK PharmaWaterSystems GmbH are here to support you with comprehensive expertise—whether it’s for the planning and implementation of PharmaWater systems, ultrapure water systems for laboratories and research, industrial water treatment, or innovative solutions for hydrogen production.

We take the time to understand your specific requirements and develop tailored concepts. Schedule an appointment today! We’d be happy to visit you on-site or welcome you to our headquarters in Leverkusen.

Did you know? EnviroFALK is part of the EnviroWater Group, a network of companies specializing in sustainable water treatment and water processing.

Curious about what our EnviroChemie colleagues are achieving in water treatment for green hydrogen production? Check out the news: EnviroChemie has been awarded the contract to supply the water treatment system for operating a PEM electrolyzer to produce green hydrogen.

Safety First? Us Too! Safety and sustainability in water treatment, combined with cost efficiency, have been our focus for over 30 years. We support key industries with our process water technology, always prioritizing what drives your business forward.

With our service network, we ensure operational security—on-site and via remote diagnostics.

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