Pure water with a clean conscience

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What we do

We clean all types of chemically and biologically-contaminated water. The clean, distilled water can be reused in production, making it an environmentally-friendly, cost-saving solution.

Biogas Wastewater

Hydrofoss cleans wastewater and recycles the treated water in biogas production.

Scrubber Sludge

Hydrofoss cleans scrubber sludge for reuse in the scrubber system.

Industrial Wastewater 

Hydrofoss cleans all types of industrially-contaminated water.

How we do it

At Hydrofoss, we clean wastewater by vacuum evaporation, using a heat exchanger to boil the wastewater. Chemicals cannot follow the vapor, which separates distilled water from the contaminated water.

This process generates scale on the evaporator plates, which requires significant maintenance—we solve this with our cleaning system, called Scale Guard®.


All of our solutions come with our unique cleaning system called ScaleGuard®. It is automatically activated for two minutes every hour. This ensures that the system is always clean - no matter how aggressive the wastewater is.

We use no chemicals and no filters.

Low energy consumption

With ScaleGuard®, excessive flushing of the evaporator plates is unnecessary. Hot wastewater can remain in the system, making it an energy-efficient system.

Standard systems must continuously flush their evaporator plates with cold, chemical-filled water to clean the system. To keep the water at boiling point, more hot water is required. This excessive flushing uses a lot of energy, and produces more wastewater that must be deposited.


Hydrofoss is a sustainable choice. All of our solutions come with an integrated ScaleGuard® system that automatically removes scale. From beginning to end, no chemicals are added.

Smart Monitoring system

With our Hydrofoss Smart Monitoring system, you can monitor remotely and analyze how your Hydrofoss product is performing via a series of sensors.

You’ll know early on if something isn’t performing as expected, and you can take action before the problem becomes crucial. That way you will reduce unscheduled maintenance, improve availability, reduce repair costs, and plan repair logistics more efficiently.


Hydrofoss is not just a green solution, it is also a good investment.
With our scrubber cleaner, you will save 69% every year in maintenance costs compared to a centrifuge.

The ROI for a Hydrofoss scrubber cleaner is only 18 months.

Our products are robustly built, and have no movable parts. The expected lifetime of a Hydrofoss product is 15 years three times as long as a centrifuge solution.

Compact & durable design

A Hydrofoss unit has a compact design - we only need the footprint of a euro pallet.
We have no moving parts that can wear down, and use the highest quality materials from Danish suppliers, designed to withstand even the toughest chemicals.


Keep up with new developments and tendencies in the field.

Ferry company orders a scrubber sludge cleaning system

We are delighted and proud to announce that a major international ferry company has chosen a Hydrofoss solution to clean their scrubber sludge.

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Ellen MacArthur Foundation

Ellen MacArthur is the woman behind circular economy. Her foundation explores the world of opportunities to re-think and re-design the way we make stuff.

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Cleaning Scrubber sludge

In September we cleaned 10 tons of scrubber sludge for a ferry company. Below is a picture of before and and after the cleaning process.

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Do you want to know more?

If you have a project, a challenge, or just want to know more about our products, we would love to hear from you.