Spectral Sensitivity And Water Biosecurity In RAS

By Assaf Lowenthal and Aran Lavi, Atlantium Technologies Ltd.

The rise of Recirculating Aquaculture Systems (RAS) has revolutionized fish farming, but it also creates new challenges for water biosecurity. Traditionally, low-pressure ultraviolet (LPUV) lamps with their peak emission at 254 nm have been the go-to solution for disinfection. However, recent studies suggest this approach might be missing the mark. Research indicates that medium-pressure (MP) lamps, emitting a wider range of UV wavelengths, could be significantly more effective. This shift in understanding hinges on the "spectral sensitivity" of pathogens. Not all UV wavelengths are created equal, and some pathogens are more susceptible to specific wavelengths than others.

This article delves into the science behind this concept, exploring how MP lamps target not only the DNA of viruses but also their protein structure, leading to more efficient inactivation. The potential benefits of MP lamps for RAS facilities are significant, ranging from reduced energy consumption to improved overall disinfection efficacy.