CN101874534A - Method for applying ultrasonic technology to film concentration preparation of tea extract - Google Patents
Method for applying ultrasonic technology to film concentration preparation of tea extract Download PDFInfo
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- CN101874534A CN101874534A CN 201010175759 CN201010175759A CN101874534A CN 101874534 A CN101874534 A CN 101874534A CN 201010175759 CN201010175759 CN 201010175759 CN 201010175759 A CN201010175759 A CN 201010175759A CN 101874534 A CN101874534 A CN 101874534A
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Abstract
The invention relates to a method for the film concentration preparation of a tea extract, which aims at providing a method for applying the ultrasonic technology to the film concentration preparation of the tea extract. The method comprises the following steps of: (1) removing slag of an extract liquid by using a gauze, and pre-filtering by using a screen mesh; (2) filtering tea juice by using a film with the molecular weight of 50000-250000 for clarification, processing the tea juice with ultrasonic waves, and controlling the temperature of the tea juice within 40 DEG G; and (3) concentrating by using a concentration film, processing the tea juice with ultrasonic waves, and controlling the temperature of the tea juice to be within 40 DEG G to obtain the concentrated tea juice when the film flux tends to zero. The ultrasonic technology is applied to the film concentration preparation of the tea extract by the invention, and the mechanical effect and the cavitation effect of the ultrasonic waves are utilized; during film ultra-filtration clarification, the clarification effect of the tea juice can be guaranteed, the preservation rate of effective ingredients and the film flux can be increased simultaneously, and thus, the efficiency of filtration can be increased. The film flux of the concentrated film during film concentration is increased, and the concentration of the concentrated juice is increased.
Description
Technical field
The present invention relates to method, particularly ultrasonic technology that the tea extract film concentrates preparation is applied to the tea extract film and concentrates method in the preparation.
Technical background
Traditional hot concentration technology was all adopted in the production of tea juice concentrating both at home and abroad in the past, but because the method relates to phase transformation, not only energy consumption is big, and heat-sensitive substance oxidation polymerization is caused damage or bad change, makes that the product cold cut is relatively poor, tea perfume (or spice) is thin, and the tealeaves flavor loss is big, and fragrance is poor.In order to change this situation, obtained systematic research based on the tea juice concentrating process technology of membrane technology.
But the technology that adopts membrane technology to carry out tea juice concentrating processing merely in filtering clarifying process, have mass efficient to become branch to lose, and filter efficiency also has much room for improvement.Adopt the inclusion concentration ratio of the concentrate that membrane technology obtains lower simultaneously, because increase along with the concentrate inclusion, the macromolecule polyalcohol body also increases thereupon in the extract, the pollution of film can increase the weight of, thereby accelerated the damage of film, cause membrane flux to descend, the inclusion content of liquid can't further increase.
Reduce tea juice loss of active ingredients in the preparation if therefore can concentrate at the tea extract film, improve the concentration and the preparation efficiency of inspissated juice, this will improve the utilization rate of tea resources so, increase the inclusion content of concentrate, improve preparation efficiency.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides a kind of and ultrasonic technology is applied to the tea extract film concentrates method in the preparation.
Ultrasonic wave is meant the mechanical wave of frequency at 20～106kHz, and it has characteristics such as frequency height, wavelength is short, penetration power is strong.When it is propagated in medium, can produce cavitation and a series of special effects and have effects such as stirring, the polymerization that disperses mist formation, cohesion, impact grinding and fatigue damage, heating, accelerating oxidation and reduction, promotion polymer substance or depolymerization.
The application of ultrasonic wave in membrane technology has two kinds: a kind of is pollution and the cleaning situation of utilizing the online detection film of the ultrasonic wave surface of high frequency short arc.The present invention utilizes the ultrasonic strengthened membrane separation process, to improve membrane flux.
Be the technical solution problem, provided by the inventionly ultrasonic technology is applied to the tea extract film concentrates method in the preparation, comprise step:
(1) tea extract removes slag through gauze, again through the screen cloth pre-filtering;
(2) the tea juice after handling in the step (1) being crossed molecular weight is 50000～250000 membrane filtration clarification, is that 20～50kHz, power are that the ultrasonic wave of 110～440W is handled to tea juice with frequency simultaneously, and the temperature of tea juice is controlled in 40 ℃;
(3) the tea juice after the processing in the step (2) is concentrated through concentrating film, simultaneously tea juice being added frequency is that 20～50kHz, power are the ultrasonic wave processing of 110～440W, and the temperature of tea juice is controlled in 40 ℃; Treat to get when membrane flux goes to zero tea juice concentrating.
Among the present invention, described tea can be all kinds of tea such as green tea, black tea, oolong tea.
Among the present invention, the film of described filtration clarification can be milipore filter, micro-filtration membrane, ceramic membrane etc.
Among the present invention, described concentrated film can be reverse osmosis membrane, NF membrane etc.
Beneficial effect of the present invention is:
Ultrasonic technology is applied to the tea extract film concentrates in the preparation, the machinery of using ultrasound ripple and cavitation effect in the film ultra filtering clarifying, when guaranteeing tea juice clarifying effect, can improve the storage rate and the membrane flux of active ingredient, improve the efficient of filtering.Improve the membrane flux that concentrates film during film concentrates, improve the concentration of inspissated juice.
The specific embodiment
Below by further specifying the present invention to specific embodiment of the present invention, but embodiment is not a limitation of the present invention.
Embodiment 1:
(1) in 1: 20 ratio of tea-water proportion broken green tea is added in 90 ℃ of water, lixiviate 10 minutes is removed slag with gauze, through the screen cloth pre-filtering.
(2) filtered fluid in the step (1) being crossed molecular weight is 100000 milipore filter, and simultaneously tea juice being added frequency is 27.5KHz, and power is that the ultrasonic wave of 330W is handled; The temperature of tea juice is controlled in 40 ℃.
The result is in ultra-filtration process, and membrane flux has increased by 28%～33%, and the content of the Tea Polyphenols of the ultrafiltrate that obtains, amino acid, caffeine has increased by 6.8%, 3.0%, 5.0% respectively, and the content of macromolecular substances such as protein, pectin is less.
(3) ultrafiltrate after step (2) processing is crossed reverse osmosis membrane and concentrate, simultaneously ultrafiltrate being added frequency is 27.5KHz, and power is that the ultrasonic wave of 330W is handled, and the temperature of tea juice is controlled in 40 ℃; Treat to get when membrane flux goes to zero tea juice concentrating.
The result is in reverse osmosis process, and membrane flux has increased by 21%～28%, and the concentration of the inspissated juice of acquisition has increased by 15%.
Embodiment 2:
(1) in 1: 20 ratio of tea-water proportion broken green tea is added in 90 ℃ of water, lixiviate 10 minutes is removed slag with gauze, through the screen cloth pre-filtering.
(2) filtered fluid in the step (1) being crossed molecular weight is 50000 milipore filter, and simultaneously tea juice being added frequency is 27.5KHz, and power is that the ultrasonic wave of 330W is handled; The temperature of tea juice is controlled in 40 ℃.
The result is in ultra-filtration process, and membrane flux has increased by 40%～250%, and the content of the Tea Polyphenols of the ultrafiltrate that obtains, amino acid, caffeine has increased by 10.9%, 6.0%, 3.1% respectively, and the content of macromolecular substances such as protein, pectin is less.
(3) ultrafiltrate after step (2) processing is crossed reverse osmosis membrane and concentrate, simultaneously ultrafiltrate being added frequency is 27.5KHz, and power is that the ultrasonic wave of 330W is handled, and the temperature of tea juice is controlled in 40 ℃; Treat to get when membrane flux goes to zero tea juice concentrating.
The result is in reverse osmosis process, and membrane flux has increased by 15%～22%, and the concentration of the inspissated juice of acquisition has increased by 18%.
Embodiment 3:
(1) use black tea as raw material;
(2) filtering the film of clarifying is micro-filtration membrane, and molecular weight is 250000, and frequency of ultrasonic is that 50kHz, power are 440W;
(3) concentrate film and use NF membrane, frequency of ultrasonic is that 50kHz, power are 440W.
All the other processing conditions are identical with embodiment 1.
Embodiment 4:
(1) use oolong tea as raw material;
(2) filtering the film of clarifying is ceramic membrane, and molecular weight is 50000, and frequency of ultrasonic is that 20kHz, power are 110W;
(3) concentrate film and use NF membrane, frequency of ultrasonic is that 20kHz, power are 110W.
All the other processing conditions are identical with embodiment 1.
What should be understood that is: more than what enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought the protection domain of inventing.
Claims (4)
1. one kind is applied to the tea extract film with ultrasonic technology and concentrates method in the preparation, comprises step:
(1) tea extract removes slag through gauze, again through the screen cloth pre-filtering;
(2) the tea juice after handling in the step (1) being crossed molecular weight is 50000～250000 membrane filtration clarification, is that 20～50kHz, power are that the ultrasonic wave of 110～440W is handled to tea juice with frequency simultaneously, and the temperature of tea juice is controlled in 40 ℃;
(3) the tea juice after the processing in the step (2) is concentrated through concentrating film, simultaneously tea juice being added frequency is that 20～50kHz, power are the ultrasonic wave processing of 110～440W, and the temperature of tea juice is controlled in 40 ℃; Treat to get when membrane flux goes to zero tea juice concentrating.
2. method according to claim 1 is characterized in that, described tea is any one in green tea, black tea or the oolong tea.
3. method according to claim 1 is characterized in that, the described film that is used for step (2) filtration clarification is any one in milipore filter, micro-filtration membrane or the ceramic membrane.
4. method according to claim 1 is characterized in that, the described concentrated film that is used for step (3) is reverse osmosis membrane or NF membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175759 CN101874534A (en) | 2010-05-18 | 2010-05-18 | Method for applying ultrasonic technology to film concentration preparation of tea extract |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175759 CN101874534A (en) | 2010-05-18 | 2010-05-18 | Method for applying ultrasonic technology to film concentration preparation of tea extract |
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| CN101874534A true CN101874534A (en) | 2010-11-03 |
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| CN 201010175759 Pending CN101874534A (en) | 2010-05-18 | 2010-05-18 | Method for applying ultrasonic technology to film concentration preparation of tea extract |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109315654A (en) * | 2018-08-10 | 2019-02-12 | 湖北大别山药业股份有限公司 | A kind of production method of Sugarless type honeysuckle sweet dew |
| CN109380557A (en) * | 2017-08-04 | 2019-02-26 | 林福南 | A kind of manufacture craft that tea and honey tea cream is concentrated |
-
2010
- 2010-05-18 CN CN 201010175759 patent/CN101874534A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| 《中国茶叶》 20081231 肖文军等 膜技术在茶叶深加工中的应用 第9-11页 1-4 , 第10期 * |
| 《农业工程学报》 20010731 岳鹏翔等 纳滤膜浓缩绿茶提取液的研究 第107-110页 1-4 第17卷, 第4期 * |
| 《膜科学与技术》 20060228 肖文军等 茶叶深加工中膜法浓缩技术研究 第55-60页 1-4 第26卷, 第1期 * |
| 《食品科学》 20091231 周为等 超声波技术在茶提取液膜浓缩制备中的应用研究 第268-270页 1-4 第30卷, 第15期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109380557A (en) * | 2017-08-04 | 2019-02-26 | 林福南 | A kind of manufacture craft that tea and honey tea cream is concentrated |
| CN109315654A (en) * | 2018-08-10 | 2019-02-12 | 湖北大别山药业股份有限公司 | A kind of production method of Sugarless type honeysuckle sweet dew |
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Application publication date: 20101103 |