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Method for producing sugar-free tea beverage by using high voltage pulsation electric-field sterilizing tech.

A high-voltage pulsed electric field and tea beverage technology, which is applied in application, tea extraction, food preservation, etc., can solve the problems of tea beverage turbidity, unsatisfactory clarification of tea juice, and inability to completely solve the problem of turbidity and precipitation, and achieve simple process and high-efficiency filtration Turbidity removal method, good effect of turbidity removal

Inactive Publication Date: 2006-01-11
JIANGNAN UNIV
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Problems solved by technology

Traditionally used chemical methods, centrifugal sedimentation and mechanical filtration methods have major defects in effect and operation, and cannot completely solve the problem of turbidity and precipitation. Turbidity still occurs during
With the development and improvement of membrane technology, some researchers and manufacturers have tried membrane technology. Studies have shown that ultrafiltration membranes can effectively remove turbidity from tea juice. However, due to the small pores of ultrafiltration membranes, the molecular mass cut-off Usually between thousands to tens of thousands of daltons, while removing mechanical impurities, it also has a high interception effect on the active ingredients in tea juice. Ultrafiltration technology is not ideal for tea juice clarification

Method used

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  • Method for producing sugar-free tea beverage by using high voltage pulsation electric-field sterilizing tech.
  • Method for producing sugar-free tea beverage by using high voltage pulsation electric-field sterilizing tech.

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Embodiment 1

[0025] Embodiment 1 sugar-free green tea beverage preparation

[0026] Because the production processes of green tea, black tea and oolong tea are very similar, and green tea beverages are most prone to browning and turbidity during preparation, the production of green tea beverages is used as an example here.

[0027] Commercially available fried green tea leaves were used as raw materials, and 5ppm□-cyclodextrin and 5ppm ZnCl were added 2 The color-protecting agent was leached in hot water at 50°C for 20 minutes. The extracted tea soup is filtered through a 200-mesh sieve, and then cooled rapidly to below 10°C. The cooled tea soup was centrifuged at 3000r / min for 15min, and suction filtered. Filter the tea soup through a 0.5 μm microporous filter to obtain clear and transparent tea soup. Part of the tea soup was inoculated with Escherichia coli, and the bacterial concentration reached 10 6 Level, for bactericidal research. The inoculated and non-inoculated tea soup is s...

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Abstract

A process for preparing the non-sugar tea beverage by use of high-voltage pulse electric field to sterilize it includes such steps as extracting from tealeaves in hot water, filter, quick cooling. Centrifugal separation of deposit, filtering by Millipore membrane and sterilizing by high-voltage pulse electric field. Its advantages are no loss of tea polyphenol and taste substances, and long storage time.

Description

technical field [0001] A method for producing sugar-free tea beverages using high-voltage pulse electric field sterilization technology. The invention relates to a production process for tea beverages, in particular to color protection, clarification and cold sterilization technologies for tea beverages, and belongs to the technical field of food engineering. Background technique [0002] According to different processing methods, tea can be divided into three categories: black tea, oolong tea, and green tea. Black tea is fully processed or fully fermented, oolong tea is semi-fermented tea, and green tea is non-fermented tea. [0003] There are many nutrients in tea: mainly amino acids, vitamins, minerals, carbohydrates, proteins, fats, etc. Tea also contains dozens of mineral elements. Among them, the content of potassium is the highest, which is equivalent to the content level of laver and kelp. Potassium is the main cation in cells and plays an important role in cell me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/16A23L3/015A23L3/005
Inventor 杨瑞金王茉
Owner JIANGNAN UNIV
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