New energy-saving green tea production technology.
2023
Thermal processes play an extremely important role in shaping the quality indicators of green tea. The primary technological process is fixation, the purpose of which is to inactivate the oxidative enzymes of the tea leaf and keep its chemical compounds in their original state. Producing green tea is an energy-intensive process. The cost of electricity is 20% of the base cost of production. The price reduction is one of the most important objectives. An innovative energy-saving technological device for fixing a tea leaf based on the method of induction (Georgian Patent 7427 B. 2022) and a new energy-saving green tea technology were developed. The paper presents the data of research and development of new energy-saving technologies and parameters of green tea production, the results of studying technological level of fixation methods and equipment, quality and chemical indicators and a safe finished product. The use of new fixation device and technology significantly reduces the cost of electricity and the cost of finished product. The results of the study of catechins in experimental green tea extracts by high-performance liquid chromatography (HPLC) showed that epigallocatechin gallate is equally present in the green tea fixed by electromagnetic induction and evaporation and is superior to the product made by the roasting method. According to the results of research, toxic elements: lead (Pb), arsenic (As), cadmium (Cd), mercury (Hg), copper (Cu), as well as: zinc (Zn), manganese (Mn), iron (Fe) absorption spectrometer (AAS 6 000), confirmed the high level of safety of Georgian green tea in accordance with the established standards. Tab. 2, Fig. 1, Ref. 23.
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