Novel tea juice concentration method

Abstract

The invention discloses a novel tea juice concentration method. The method includes the following steps of S1, preparation of raw materials, wherein tea components are extracted with hot water, a tea juice stock solution with the solid content of 0.8%-3% is obtained through at least one-time pre-filtration with a 300-500-mesh filter screen or a filter bag, and the tea juice stock solution with the set volume is put into a raw material tank; S2, preparation of a drawing liquid, wherein a salt solution or saccharide solution with the osmotic pressure greater than 3.5 Mpa is prepared into the drawing liquid, and the drawing liquid with the set volume is put into a drawing liquid tank; S3, concentration, wherein a raw material circulating pump is started to convey the stock solution into a forward osmosis membrane module, a drawing liquid circulating pump is started to convey the drawing liquid into the forward osmosis membrane module at the same time, the temperature is controlled at 10-30 DEG C, the pressure is controlled at 0-2 bar, the circulating flow rate of the stock solution is 20-120 L / h, the circulating flow rate of the drawing liquid is 10-50 L / h, and concentrated tea juice with the soluble solid concentration of 30-60% is obtained 40-120 minutes after running. According to the method, the tea juice is concentrated by utilizing a forward osmosis membrane technology, there is no external pressure for driving in the forward osmosis membrane concentration process, the energy consumption is small, the contamination degree of a membrane surface is small, and flavor substances and nutrient substances in the tea juice can be retained.

Description

technical field [0001] The invention relates to the technical field of beverage concentration, in particular to a novel tea juice concentration method. Background technique [0002] Tea is one of the traditional beverages in China. Tea has the medicinal effect of keeping fit and curing diseases. It is also full of appreciation and can cultivate sentiment. There is a long record of drinking tea in Chinese history, and drinking tea has become a kind of culture. With the continuous development of social economy and the continuous development of material civilization and spiritual civilization, tea culture has injected new connotation and vitality. The connotation and expression of tea culture are constantly expanding, extending, innovating and developing. [0003] Tea beverages refer to beverages processed from tea extracts, tea powder, and concentrates. Tea contains natural tea polyphenols, caffeine and other active ingredients, which have both nutritional and health benefits...

AI Technical Summary

Problems solved by technology

The evaporative concentration process can be concentrated to a higher concentration, but the tea juice concentrated in this way has a lot of loss of aroma components, high viscosity and poor sensory quality. After dilution and preparation into tea beverages, it is easy to produce turbidity and precipitation, which affects the quality of tea beverages. taste

The reverse osmosis membrane concentration process can maintain the aroma and quality of the original tea, but the concentration of tea juice can only be concentrated to 20%-25%, and the operating pressure of the reverse osmosis membrane system is relatively high, reaching above 4.0MPa, and its energy consumption is high , high production cost

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