The green alternative


Replacing heat with UV-light created the possibility to reinvent pasteurization, we call this new method Raslysation. The natural anti-bacterial properties of UV-light has been known for more than 100 years. It is widely used for disinfecting drinking and processing water, but now it can also be used for non-see through liquids such as milk. This allows for a more sustainable production.

Lyras’ Raslysation technology uses low-pressure germicidal UV-lamps to generate the disinfecting light, and as the first of its kind, Lyras’ new and patented system has integrated light filters, which remove the unnecessary wavelengths that elsewise could risk to lower product quality. The light filter only allows for the desired wavelengths to pass through, and these inactivate spores and bacteria at a level conventional pasteurization cannot. As an addition hereto, the unique design geometry creates a turbulent flow that exposes the entire volume of the liquid. In short, you have a system that can treat any non-see-through liquid, e.g. milk, juice or soda.

Energy Efficient

Higher Quality

Higher up-time

Extended Shelf Life

No Fossil Fuels

No Waste

Simpler Production

Global Health Impact

Liquids that can be processed with Lyras' equipment.

Pasteurization up
until today

Back in 1864 the French chemist Louis Pasteur developed a method for preserving liquid foods by heating them up and cooling them down in rapid succession – a process later known as pasteurization.

For the past 150 years, pasteurization has saved millions of lives by inactivating the bacteria within easily corruptible foods, such as dairy products, thereby preserving them for longer periods.

Though at the time revolutionary, heat pasteurization is not without drawbacks. It is a time-consuming process that lowers the product quality while consuming vast amounts of energy in the heating and cooling processes.

Today, almost all liquid food products are pasteurized including milk, juice, soda and plant-based drinks. Pasteurized products are thereby an inevitable part of the consumers’ everyday life, though only a minority of consumers are aware of this.


Curiosity led to the invention.
The positive impact on our climate and higher product quality led me to pursue the business.

Rasmus Mortensen, CEO & FOUNDER

Rasmus Mortensen, CEO & FOUNDER
Lyras system being designed
Wave length calculation at Lyras
Drawing the process of UV-pasteurizing