Several studies described the processing
of cactus pears (Opuntia sp.) into fruit juices and related
products [7–9], while the production of purple pitaya (Hylocereus polyrhizus [Weber] Britton & Rose) juice at semiindustrial scale has not been described, so far. Compared to
most cactus pears, pitayas are devoid of glochids, exhibit an
exceptional red-purple hue and feature significantly higher
betalain contents [10]. Thus, the colouring foodstuff portion required to achieve the desired tinctorial strength can
be considerably reduced. Additionally, by blending purple
pitaya and yellow-orange cactus pear juice, a broad colour
range can be obtained [11].