Antimicrobial Blue Light Reduces Listeria Contamination on a Rainbow Trout Processing Line Case study presented in Nor-Fishing 2026
Nor-Fishing 2026 brings together industry leaders, technology providers, and decision-makers from more than 50 countries. In the focus: hygiene control, food safety, and innovative technologies for the entire value chain.
Spectral Blue was invited to present new findings on continuous disinfection using blue light. Karin Henricson presented data on the use of Multi-Wavelength, High-Intensity (MWHI) blue light devices on a rainbow trout processing line and demonstrated how Listeria on production lines can be reduced during ongoing operations.
Case study - presented in Nor-Fishing 2026
Spectral Blue MWHI® multi-wavelength antimicrobial blue light (aBL) was deployed at a high-capacity rainbow trout processing facility located in the Nordics. The target was to improve hygiene at a sorting line where Listeria contamination had been a recurring problem during previous production seasons.
Listeria monocytogenes is a well-known challenge in fish processing. It survives in cold and wet environments, can attach to surfaces and form biofilms, and can be difficult to remove completely with normal cleaning and disinfection.
This case study was originally presented on 18 August 2026 at Nor-Fishing 2026 conference in Trondheim, Norway.
You can find the full article and the video on the on the webpage from Spectral Blue Read more about:
- How Spectral Blue's Multi-Wavelength, High-Intensity (MWHI®) disinfection technology reduced contamination by 50% during ongoing operations.
- What experiences have been gained, and how exposure to blue light during production has enhanced hygiene and improved product quality.