Oxygen-fed temperature-humidity-changing fermentation method for Congou black tea

Abstract

The invention provides an oxygen-fed temperature-humidity-changing fermentation method for Congou black tea. The method is implemented by selecting Fuding dabai fresh leaves with one-bud one-leaf tenderness to one-bud two-leaf tenderness as a raw material, withering and rolling. According to the method, an inherent thinking that traditional fermentation is implemented by not controlling or roughly controlling temperature and humidity or implemented at a constant temperature and a constant humidity is broken through, and the oxygen concentration, relative humidity and temperature are precisely regulated by aid of a manual climatic box (manual climatic chamber); and secondly, by means of oxygen-fed temperature-humidity changing, at the early stage, the formation of quality substances such as theaflavin and thearubigins is ensured through oxygen-fed high-temperature low-humidity fermentation, and at the late stage, the reaction of converting the theaflavin into the thearubigins and theabrownin is restrained through the oxygen-fed low-temperature high-humidity fermentation, so that the high content of the theaflavin of a prepared tea is ensured, and the continuous conversion of other quality substances is also ensured, and therefore, black tea products with the excellent organoleptic quality are obtained.

Description

technical field [0001] The invention belongs to the technical field of tea processing, and relates to black tea fermentation technology, in particular to a method for fermenting Gongfu black tea with oxygen, temperature, and humidity. Background technique [0002] Fermentation is the key process for the formation of the quality of Gongfu black tea. Traditional production is dominated by natural fermentation, that is, fermentation is carried out under natural environmental conditions without regulating the temperature and humidity of the fermentation environment. At present, Gongfu black tea production enterprises are gradually building special fermentation rooms. Heating and humidification devices are installed in the fermentation rooms to achieve continuous control of the ambient temperature and humidity. However, the existing relative humidity control has a large fluctuation range, and the fermentation temperature is only constant. Regulation does not take into account the...

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Problems solved by technology

At present, Gongfu black tea production enterprises are gradually building special fermentation rooms. Heating and humidification devices are installed in the fermentation rooms to achieve continuous control of the ambient temperature and humidity. However, the existing relative humidity control has a large fluctuation range, and the fermentation temperature is only constant. Regulation does not take into account the fermentation process of changing temperature and humidity with oxygen, which affects the accumulation of theaflavin, thearubigin and other quality substances to a certain extent, and the quality of the finished tea is damaged

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