Role of Ultrasonic-assisted Fermentation on Kombucha Black Tea Process Enhancements

Authors

  • Voraluck Suriwong Division of Food Engineering, Faculty of Food and Agricultural Technology, Pibulsongkram Rajabhat University, Phitsanulok
  • Somkiat Jaturonglumlert Division of Food Engineering, Faculty of Engineering and Agro-industry, Maejo University
  • Chananda Thinan
  • Thapanee Chongwang

Abstract

This research aimed to study effects of ultrasonic waves on the fermentation process of black tea kombucha. Kinetics of TA during kombucha fermentation, fermentation time, physical and chemical properties of kombucha black tea and the number of yeasts were studied. It was found that the appropriate ratio for 1 Litre of kombucha fermentation at room temperature was 3 g/L of black tea, 10%(w/v) of sugar and 10%(v/v) of scoby. By using the appropriate ratio, the good taste kombucha black tea would obtained from 8 – 11 days of fermentation time with final pH 3.30±0.303 and total acid (in terms of acetic acid) of 4.25±0.110 g/L. In addition, the effect of ultrasonic waves on the fermentation time, the physical and chemical properties of kombucha tea showed that the longer the ultrasonic treatment, the shorter the fermentation time of kombucha tea without color changes of black tea kombucha. The shortest fermentation time occurred in the black tea kombucha fermentation with the ultrasonic treatment of US pulse-US pause 30 mins per day (60%). The kinetics of TA during the fermentation of black tea kombucha could be well explained by exponential equation;   with  of 0.96 – 0.99. However, properties changes during fermentation depended on source of scoby and fermentation condition.

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Published

2023-01-04