Pasteurization of grapefruit juice using a centrifugal ultraviolet light irradiator

► A centrifugal UV irradiator nonthermally inactivated microorganisms in grapefruit juice. ► The centrifugal irradiator formed a very thin film of juice which is conducive to UV treatment. ► Escherichia coli and Saccharomyces cerevisiae in grapefruit juice were reduced by 5 and 6 log, respectively. ► Treatment took 3.2 s and used a fraction of the energy of traditional thermal pasteurization. ► Grapefruit juice may be pasteurized using a nonthermal UV irradiator that centrifugally forms a thin film.