Pilot-scale studies of dried fish irradiation: Bulk packaging of irradiated dried fish

Two methods of salting fresh chub mackerel (R. neglectus) were examined: dry salting and brine salting. With dry salting (and sun drying) moulding occurs after 1 month. Sorbate prevents moulding. Irradiation reduces the bacterial population. Best results are obtained with sorbate and radiation used in combination. The brine salting investigation was not completed at the time of writing. Packaging materials for study were selected on the basis of the physical protection that could be obtained and also cost. Based on drop tests, irradiation of polyethylene film with doses up to 10 kGy does not significantly affect tensile strength or tear resistance. Similar results were obtained with polypropylene woven cloth. Carton boxes were unchanged with doses up to 5 kGy. Carton boxes are more suitable than woven bags for large scale irradiation. (author). 2 figs, 12 tabs