Çakmak Tümay Gözdem, Saricaoglu Beyza, Ozkan Gulay, Tomas Merve, Capanoglu Esra
Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering Istanbul Technical University Istanbul Turkey.
Department of Food Engineering, Faculty of Engineering and Natural Sciences Istanbul Sabahattin Zaim University Istanbul Turkey.
Food Sci Nutr. 2024 Mar 4;12(5):3112-3124. doi: 10.1002/fsn3.4011. eCollection 2024 May.
Tea is the most consumed beverage worldwide and has many health effects. Although there are many different types of tea, black tea and green tea comprise 98% of total tea production in the world. Tea waste production consists of withering, crushing, fermentation, drying and finally packaging processes. All of the waste generated during this production line is called tea waste. Tea production results in a significant amount of waste that cannot be effectively used for value creation. This waste contains many different components including protein, fiber, caffeine, and polyphenols. Due to its rich composition, it can be revalorized for different purposes. In this study, the general composition and bioactive compounds of tea waste were reviewed. Despite the fact that there have been few studies on the bioactivity of tea waste, those studies have also been discussed. The extraction techniques that are used to separate the compounds in the waste are also covered. It has been indicated that these valuable compounds, which can be separated from tea wastes by extraction methods, have the potential to be used for different purposes, such as biogas production, functional foods, food additives, silages, soluble packaging materials, and adsorbents. Although there are some studies on the revalorization of tea waste, new studies on the extraction of bioactive compounds are necessary to improve its utilization potential.
茶是全球消费最多的饮品，具有多种健康功效。尽管茶有许多不同种类，但红茶和绿茶占世界茶叶总产量的98%。茶叶废弃物产生于萎凋、揉捻、发酵、干燥以及最后的包装过程。这条生产线中产生的所有废弃物都称为茶叶废弃物。茶叶生产会产生大量无法有效用于创造价值的废弃物。这种废弃物包含许多不同成分，包括蛋白质、纤维、咖啡因和多酚。由于其成分丰富，可以用于不同目的而实现再利用。在本研究中，对茶叶废弃物的一般成分和生物活性化合物进行了综述。尽管关于茶叶废弃物生物活性的研究较少，但这些研究也在文中进行了讨论。文中还涵盖了用于分离废弃物中化合物的提取技术。研究表明，通过提取方法从茶叶废弃物中分离出的这些有价值的化合物有潜力用于不同目的，如生产沼气、制作功能性食品、食品添加剂、青贮饲料、可溶包装材料和吸附剂等。尽管已有一些关于茶叶废弃物再利用的研究，但仍需要开展新的生物活性化合物提取研究以提高其利用潜力。
