Optimization of Extraction Process for Tea Polyphenols from Tea Seed Cake and Study on Their Antibacterial Properties
Year: 2025
Type: article
Abstract: Tea polyphenols are a natural antioxidant with a wide range of biological activities, and the extraction process of tea polyphenols was optimized by supercritical extraction technology using tea dry cake as raw material, and its antibacterial properties were discussed. The extraction conditions were optimized by single factor experiment and response surface method, and the optimal process parameters were determined as follows: extraction pressure 25 MPa, extraction temperature 50°C, extraction time 90 minutes, and CO₂ flow rate 20 L/h. Under these conditions, the yield of tea polyphenols reached 15.2%. Antibacterial experiments showed that tea polyphenol extract had a significant inhibitory effect on Escherichia coli and Staphylococcus aureus, with the minimum inhibitory concentration (MIC) of 0.4 mg/mL and 0.6 mg/mL, respectively. This study provides a theoretical basis for the high-value utilization of tea cake.
Source: Global Academic Frontiers
Author: Jiang Gaojin
Institution: Ningbo University of Finance & Economics
Language: English
Topic: Tea Polyphenols and Effects
Subfield: Pathology and Forensic Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W6930695455
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