Abstract
Part of the transportation sector in Norway has reacted to meltwater generated by warm fish cooled with ice during transport by installing meltwater collection tanks on semi-trailers. This capital investment prevents meltwater from discharging onto the roads. However, the current approach needs further refinement to work in winter. All options identified in this report require further investment. This report discusses chemical additives, active heating, passive insulation, and the combination of heating and insulation for winter use of tanks. It was found that all approaches have their place and that each approach has certain drawbacks. The optimal solution will be a balance between costs, maintenance effort, operational constraints and environmental impact, and targeted environmental conditions. These differ between operators. The tank size could be increased to 250 L without apparent issues, and some operators already use 500 L.