Effect of spray-drying process parameters on different properties of pomelo (Citrus grandis (L.) Osbeck) juice powder

Abstract

     In this study, the effects of post-harvest storage time, the ratio of carrier material (maltodextrin –MD⁺ gum arabic-GA) on some physiochemical and sensory properties of Co Co pomelo powder were investigated. Two variables including post-harvest storage time (1-8) weeks, (ii) 5%-20% concentrations of carrier agents (a mixture of 85 % Maltodextrin–MD⁺ 15 % gum arabic-GA) were investigated. The results showed that different post-harvest storage times and concentrations of carrier agents had significant effects on the physicochemical properties of spray-dried products.The content of bioactive compounds such as TPC, vitamin C and TFC in raw grapefruit and grapefruit powder showed a decreasing trend as the storage time increased. In particular, grapefruit with a storage time of 2 weeks after harvest was most suitable for spray-dried grapefruit powder processing, the obtained product had a sensory score (average 8.01 points) after reconstitution and a high content of bioactive compounds such as TPC, vitamin C and TFC. In addition, with a ratio of 10%-15% drying aids (MD + GA), the obtained product had a high recovery efficiency (57.34-58.65) % and the ability to retain components such as TPC, vitamin C and TFC. The soluble grapefruit powder product had a low moisture content (4-5) % suitable for storage and transportation. The research results contribute to improving the usage value of Co Co pomelo locally.