The wellboat Grip Arctic is a fish carrier sailing under the flag of Chile, with a carrying capacity of 500 t DWT. As the vessel is transporting live fish, increased welfare regulations have made it a requirement to disinfect the water.
During the transport of fish ready for slaughter, the water needs to be disinfected after it has been in contact with the fish. Additionally, during smolt transport, the water needs to be disinfected both before and after it has been in contact with the smolt.
To meet the increased fish welfare regulations, a biosecurity upgrade was required for the wellboat. In this case, the exact requirements were to meet a disinfection protocol of a minimum EOLL (End of Lamp Lifetime) dose of 90mJ/cm2, following the previously mentioned disinfection conditions.
To comply with the Chilean fish welfare regulations, UV disinfection was utilized to ensure the defined biosecurity standards. Unlike wellboats without defined disinfection protocols, the high-quality disinfection processes will now exclude the risk of cross-contamination.
A total of 4 UV systems were installed to fulfill the defined disinfection protocol.
The 4 systems were perfectly fit for the task, as they were easily retrofitted into the complex and tight areas that wellboats contain. The ULTRATRON series ensured the required high power densities in compact spaces, with additional efficiency improvements from the internal reflection of the electropolished reactor. Another key feature is the lamps which include a stabilizing design to ensure that the system is protected against residual vibrations and shocks.
Another reason why utilizing UV systems for the wellboat industry is becoming widely implemented, is due to the disinfection process not influencing key water properties, such as temperature, pH, and oxygen levels, which creates optimal conditions for the transported fish.
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