Lyras Raslysation microbial inactivation technology

Danish company Lyras was founded on an ambition to prove that microbial inactivation in milk could be done efficiently using UV light instead of pasteurisation. The company has now developed a patented technology that can treat most liquid products — independently of transparency and product type.

Lyras’s Raslysation technology uses low-pressure germicidal lamps with a patented integrated light filter that removes unnecessary and damaging wavelengths. The light filter only allows for the desired wavelengths to pass through, which inactivates bacteria, spores and fungi in the processed liquid. This is due to the design geometry, which creates a turbulent flow that exposes the entire volume of the liquid.

By using UV light instead of heat, the technology is designed to provide a high bacterial kill rate without compromising the quality of the product.

The simple, compact system uses a gentle treatment that can preserve vitamins and proteins while extending shelf life of the product. When compared to traditional pasteurisation, the technology is claimed to be able to reduce energy consumption up to 90% while also reducing water waste by up to 60%.

As it is a non-thermal treatment, the technology does not require fossil fuels for heating and cooling the product. The non-thermal design of the system helps to ensure that no water or product is wasted during production.

The hygienic coils, used for the product flow, are chemically inert and made of food-grade material. Furthermore, to ensure food safety during the short treatment there are no food-glass contact surfaces.

The technology is also suitable for milk, plant-based milk, cheese, juice, soda, egg and wine products.