Pretreatment of citrus by-products affects polyphenol recovery: a review

Konstantinos Papoutsis, Quan V. Vuong, John B. Golding, Joaquín H. Hasperué, Penta Pristijono, Michael C. Bowyer, Christopher J. Scarlett, Costas E. Stathopoulos

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)
    176 Downloads (Pure)


    A large amount of citrus waste is generated annually. This waste is of great economic worth, since it contains high levels of polyphenols, which have attracted scientific interest due to their potent antimicrobial and antiradical activities. Pretreatment is a crucial step that precedes the extraction process and influences the yields and quality of polyphenols. This review emphasizes the effect of different drying processes, such as freeze drying, hot-air drying, vacuum drying, microwave drying, infrared drying, and high-speed drying, on the polyphenol retention in citrus by-products. Further treatments of the dried citrus by-products for assisting the liberation of bound polyphenols are also provided and comprehensively discussed.
    Original languageEnglish
    Pages (from-to)770-795
    Number of pages26
    JournalFood Reviews International
    Issue number8
    Early online date26 Feb 2018
    Publication statusPublished - 2018


    • Citrus pomace
    • Drying techniques
    • Polyphenol liberation
    • Treatment of dried pomace
    • Valorization
    • Lyophilisation


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