CN109984234A - A kind of preparation method of clarification type tea concentrate - Google Patents
A kind of preparation method of clarification type tea concentrate Download PDFInfo
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- CN109984234A CN109984234A CN201910235518.6A CN201910235518A CN109984234A CN 109984234 A CN109984234 A CN 109984234A CN 201910235518 A CN201910235518 A CN 201910235518A CN 109984234 A CN109984234 A CN 109984234A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/166—Addition of, or treatment with, enzymes or microorganisms
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/18—Extraction of water soluble tea constituents
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/22—Drying or concentrating tea extract
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Abstract
The present invention relates to teas processing technique fields, and in particular to a kind of preparation method of clarification type tea concentrate, preparation method include: (1) feedstock processing: finished tea being carried out grating and is sieved；(2) it extracts: stirring and leaching in boiling water is added in the tealeaves after grating；(3) enzymatic hydrolysis clarification: complex enzyme is added into tea extract, then extracting solution is pumped into enzymatic vessel and is digested；(4) coarse filtration: the tea extract after enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration；(5) coarse filtration liquid enzyme deactivation: is pumped into progress high temperature enzyme deactivation in heat exchanger；(6) refined filtration: the tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure；(7) it is concentrated: the tea extract after refined filtration is added in vacuum decker, carry out heating in vacuum concentration；The present invention uses unique combined-enzyme method to realize the enzymeization clarification of tea concentrate, especially has remarkable result to the prevention of " cream down " phenomenon of tea concentrate.
Description
Technical field
The present invention relates to teas processing technique fields, and in particular to a kind of preparation method of clarification type tea concentrate.
Background technique
Tealeaves is used as sacrificial offerings earliest derived from China, tealeaves.But from the later period in spring and autumn just by people as vegetable edible, in west
The Hanzhong phase development be it is medicinal, Western Han Dynastry's later period just develop be imperial palace high-grade drink.Tealeaves, Ye Gezhi, oblong or ellipse, can be with
Drink is directly steeped with boiled water, is contained the ingredients such as catechin, cholestenone, caffeine, inositol, folic acid, pantothenic acid in tealeaves, can be promoted
Human health.Tea-leaf beverage has been known as " one of big beverage in the world three " at present.
The tea beverage that consumer obtains is mostly that tea concentrate dilutes.Currently, in industry tea concentrate preparation method
Are as follows: processing is extracted to tealeaves with water at high temperature, extracting solution is then demultiplex out and is concentrated.Under normal circumstances, it is concentrated
The soluble solid for including in liquid is gradually converted into insoluble solid in storage, causes millet paste muddy, therefore, it is necessary to
A series of additional processing steps are carried out to alleviate the problem of gradually forming of insoluble solid in storage.It is conventional to solve millet paste
Muddy problem is, that is, by adjusting the techniques such as processing variable such as temperature, pressure, to accelerate insoluble solid heavy except tea cream method
The formation in shallow lake removes the impurity being settled out through centrifugation, filtering or other technologies after.
Though the technical solution can play the effect for improving tea concentrate clarity, during low temperature storage, tea is dense
A degree of muddy and precipitating is still easily formed in contracting liquid.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of preparation methods of clarification type tea concentrate, to tea concentrate
" cream down " phenomenon is significantly improved effect.
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of preparation method of clarification type tea concentrate, comprising the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, then takes out standing cooling, obtains tea extraction
Liquid；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract,
Then extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation compared with
Big impurity, obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution is without precipitating
Object；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, at 65 DEG C, the item of vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate under part.
Preferably, the mass ratio of tealeaves and water is 1:40-45 in step (2).
Preferably, it needs to be stirred to accelerate enzymolysis speed in step (3).
Preferably, concentration 25-150mg/L of the complex enzyme described in step (3) in tea extract, and in the complex enzyme
Cellulase, pectinic acid enzyme, protease, tannase mass ratio be 2.5-3.0:1.2-1.5:1.7-1.9:0.3-0.7.
Preferably, the complex enzyme cellulase, pectinic acid enzyme, tannase mass ratio be 2.5:1.2:1.9:
0.7。
Preferably, the aperture of cloth bag is 100-150 mesh in cloth-bag type filter centrifugal described in step (4).
Preferably, the temperature of step (5) high temperature enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
Preferably, filter membrane selects 0.25-0.35 μm of hollow-fibre membrane in vacuum filter described in step (6).
The utility model has the advantages that
The present invention uses unique combined-enzyme method to realize the enzymeization clarification of tea concentrate, especially to tea concentrate
The prevention of " cream down " phenomenon has remarkable result.The correlative that precipitating is formed in the millet paste that can degrade is used by complex enzyme
Matter.Protein in millet paste can be hydrolyzed into amino acid by the addition of protease, can not only improve the fragrance and fresh refreshing degree of millet paste,
It also can be reduced the generation of insoluble compound, improve the soup look of tea concentrate；The addition of cellulase and pectase can decompose
The cell wall of tea cell and pectin layer, are destroyed eucaryotic cell structure, conducive in tealeaves Polyphenols, amino acid, caffeine, can
The dissolution of the effective components such as dissolubility sugar, without the quality of influence tea while improving tealeaves extraction rate；The addition energy of tannase
The ester bond between catechol and galla turcica is enough cut off, the lesser water-soluble short-chain substance of molecular weight is formed, so that it is dense that tea is effectively reduced
The turbidity of contracting liquid.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Embodiment 1:
A kind of preparation method of clarification type tea concentrate, comprising the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, then takes out standing cooling, obtains tea extraction
Liquid；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract,
Then extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation compared with
Big impurity, obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution is without precipitating
Object；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, at 65 DEG C, the item of vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate under part.
The mass ratio of tealeaves and water is 1:40-45 in step (2).
It needs to be stirred to accelerate enzymolysis speed in step (3).
Concentration 150mg/L of the complex enzyme in tea extract in step (3), and complex enzyme cellulase, pectinic acid
Enzyme, protease, tannase mass ratio be 2.5:1.2:1.9:0.7.
The aperture of cloth bag is 100-150 mesh in cloth-bag type filter centrifugal described in step (4).
The temperature of step (5) high temperature enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
Filter membrane selects 0.25-0.35 μm of hollow-fibre membrane in vacuum filter described in step (6).
The tea concentrate prepared in embodiment 1 is saved at 2 DEG C, the appearance and concentration of different time points tea concentrate
The content of insoluble solid is as shown in the table in liquid:
Embodiment 2:
A kind of preparation method of clarification type tea concentrate, comprising the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, then takes out standing cooling, obtains tea extraction
Liquid；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract,
Then extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation compared with
Big impurity, obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution is without precipitating
Object；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, at 65 DEG C, the item of vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate under part.
The mass ratio of tealeaves and water is 1:40-45 in step (2).
It needs to be stirred to accelerate enzymolysis speed in step (3).
Concentration 90mg/L of the complex enzyme in tea extract in step (3), and complex enzyme cellulase, pectinic acid
Enzyme, protease, tannase mass ratio be 2.7:1.3:1.8:0.4.
The aperture of cloth bag is 100-150 mesh in cloth-bag type filter centrifugal described in step (4).
The temperature of step (5) high temperature enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
Filter membrane selects 0.25-0.35 μm of hollow-fibre membrane in vacuum filter described in step (6).
The tea concentrate prepared in embodiment 2 is saved at 2 DEG C, the appearance and concentration of different time points tea concentrate
The content of insoluble solid is as shown in the table in liquid:
Embodiment 3:
A kind of preparation method of clarification type tea concentrate, comprising the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, then takes out standing cooling, obtains tea extraction
Liquid；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract,
Then extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation compared with
Big impurity, obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution is without precipitating
Object；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, at 65 DEG C, the item of vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate under part.
The mass ratio of tealeaves and water is 1:40-45 in step (2).
It needs to be stirred to accelerate enzymolysis speed in step (3).
Concentration 50mg/L of the complex enzyme in tea extract in step (3), and complex enzyme cellulase, pectinic acid
Enzyme, protease, tannase mass ratio be 2.6:1.4:1.7:0.6.
The aperture of cloth bag is 100-150 mesh in cloth-bag type filter centrifugal described in step (4).
The temperature of step (5) high temperature enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
Filter membrane selects 0.25-0.35 μm of hollow-fibre membrane in vacuum filter described in step (6).
The tea concentrate prepared in embodiment 3 is saved at 2 DEG C, the appearance and concentration of different time points tea concentrate
The content of insoluble solid is as shown in the table in liquid:
Embodiment 4:
A kind of preparation method of clarification type tea concentrate, comprising the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, then takes out standing cooling, obtains tea extraction
Liquid；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract,
Then extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation compared with
Big impurity, obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution is without precipitating
Object；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, at 65 DEG C, the item of vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate under part.
The mass ratio of tealeaves and water is 1:40-45 in step (2).
It needs to be stirred to accelerate enzymolysis speed in step (3).
Concentration 120mg/L of the complex enzyme in tea extract in step (3), and complex enzyme cellulase, pectinic acid
Enzyme, protease, tannase mass ratio be 2.9:1.5:1.7:0.5.
The aperture of cloth bag is 100-150 mesh in cloth-bag type filter centrifugal described in step (4).
The temperature of step (5) high temperature enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
Filter membrane selects 0.25-0.35 μm of hollow-fibre membrane in vacuum filter described in step (6).
The tea concentrate prepared in embodiment 4 is saved at 2 DEG C, the appearance and concentration of different time points tea concentrate
The content of insoluble solid is as shown in the table in liquid:
Embodiment 5:
A kind of preparation method of clarification type tea concentrate, comprising the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, then takes out standing cooling, obtains tea extraction
Liquid；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract,
Then extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation compared with
Big impurity, obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution is without precipitating
Object；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, at 65 DEG C, the item of vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate under part.
The mass ratio of tealeaves and water is 1:40-45 in step (2).
It needs to be stirred to accelerate enzymolysis speed in step (3).
Concentration 25mg/L of the complex enzyme in tea extract in step (3), and complex enzyme cellulase, pectinic acid
Enzyme, protease, tannase mass ratio be 3.0:1.3:1.9:0.3.
The aperture of cloth bag is 100-150 mesh in cloth-bag type filter centrifugal described in step (4).
The temperature of step (5) high temperature enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
Filter membrane selects 0.25-0.35 μm of hollow-fibre membrane in vacuum filter described in step (6).
The tea concentrate prepared in embodiment 5 is saved at 2 DEG C, the appearance and concentration of different time points tea concentrate
The content of insoluble solid is as shown in the table in liquid:
Control group
Control group (control group is commercially available tea concentrate) is saved, the appearance of different time points tea concentrate at 2 DEG C
And in concentrate insoluble solid content it is as shown in the table:
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of preparation method of clarification type tea concentrate, which comprises the following steps:
(1) feedstock processing
Finished tea is subjected to grating and crosses 40-60 mesh；
(2) it extracts
Stirring and leaching 20-30min in boiling water is added in tealeaves after grating, standing cooling is then taken out, obtains tea extract；
(3) enzymatic hydrolysis clarification
The complex enzyme being made of cellulase, pectinic acid enzyme, protease, tannase is added into above-mentioned tea extract, then
Extracting solution is pumped into enzymatic vessel, digests 45-60min under conditions of 45 DEG C, pH are 5.6；
(4) coarse filtration
Tea extract after above-mentioned enzymatic hydrolysis is added in cloth-bag type filter centrifugal and carries out centrifugal filtration, except degranulation is biggish
Impurity obtains coarse filtration liquid；
(5) enzyme deactivation
Above-mentioned coarse filtration liquid is pumped into heat exchanger, high temperature enzyme deactivation is carried out；
(6) refined filtration
Tea extract after enzyme deactivation is poured into vacuum filter and is filtered under diminished pressure, filtered extracting solution deposit-free；
(7) it is concentrated
Tea extract after refined filtration is added in vacuum decker, under conditions of 65 DEG C, vacuum degree 670-700 millimetres of mercury
Heating concentration 1-2h, is made above-mentioned clarification type tea concentrate.
2. a kind of preparation method of clarification type tea concentrate according to claim 1, it is characterised in that: tea in step (2)
The mass ratio of Ye Yushui is 1:40-45.
3. a kind of preparation method of clarification type tea concentrate according to claim 1, it is characterised in that: step needs in (3)
It is stirred to accelerate enzymolysis speed.
4. a kind of preparation method of clarification type tea concentrate according to claim 1, it is characterised in that: institute in step (3)
State concentration 25-150mg/L of the complex enzyme in tea extract, and the complex enzyme cellulase, pectinic acid enzyme, albumen
Enzyme, tannase mass ratio be 2.5-3.0:1.2-1.5:1.7-1.9:0.3-0.7.
5. a kind of preparation method of clarification type tea concentrate according to claim 4, it is characterised in that: in the complex enzyme
Cellulase, pectinic acid enzyme, tannase mass ratio be 2.5:1.2:1.9:0.7.
6. a kind of preparation method of clarification type tea concentrate according to claim 1, it is characterised in that: institute in step (4)
The aperture for stating cloth bag in cloth-bag type filter centrifugal is 100-150 mesh.
7. a kind of preparation method of clarification type tea concentrate according to claim 1, it is characterised in that: high in step (5)
The temperature of warm enzyme deactivation is 125-130 DEG C, and the enzyme deactivation time is 5-8s.
8. a kind of preparation method of clarification type tea concentrate according to claim 1, it is characterised in that: institute in step (6)
State the hollow-fibre membrane that filter membrane in vacuum filter selects 0.25-0.35 μm.
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