CN106820183A - Canned grape and preparation method thereof - Google Patents
Canned grape and preparation method thereof Download PDFInfo
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- CN106820183A CN106820183A CN201611242896.XA CN201611242896A CN106820183A CN 106820183 A CN106820183 A CN 106820183A CN 201611242896 A CN201611242896 A CN 201611242896A CN 106820183 A CN106820183 A CN 106820183A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N7/00—Peeling vegetables or fruit
- A23N7/01—Peeling vegetables or fruit using chemical substances, e.g. lye
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Abstract
The invention provides a kind of canned grape and preparation method thereof, the wherein preparation method includes following grape peeling step：(1) grape to be removed the peel is contacted with alcoholic solution；(2) the grape (1) processed through step is contacted with the peeling liquid that wherein NaOH and/or concentration of potassium hydroxide are 1 15%.Contacted with alcoholic solution and alkalescence peeling liquid successively by making grape, grape decortication process in grape preparation method of the present invention has the advantages that environmentally friendly, inexpensive and easily controllable, gained grape berry any surface finish is complete and good colour, can effectively improve the quality of canned grape.
Description
Technical field
The present invention relates to a kind of canned grape and preparation method thereof, grape therein is removed the peel using chemical peeling method
's.
Background technology
, it is necessary to carry out peeling treatment to grape in the preparation process of canned grape.Traditional manual grape barking method is not
Only the amount of labour used is big, and efficiency is low, it is difficult to the need for effectively meeting mass production, and grape is easily broken during operation, gained Portugal
Grape percentage of head rice is low, and loss is high so that peeling cost and quality all receive larger restriction with influence.Also, due to grape tool
The characteristics of having smooth epidermis, small volume, soft meat, thus be also difficult to using automatic/semi-automatic machine barking equipment to grape
Removed the peel.Therefore, scientific research personnel is it has been suggested that cross the chemical peeling method for grape remove the peel treatment using high temperature alkaline solution.
For example, Chinese patent literature CN91106407.9 discloses a kind of red, green grapes can production method, wherein will
In the alkali lye that grape fruit immersion concentration is 10-20%, temperature is 90-100 DEG C, pulled out after persistently stirring 10-20 seconds, rushed through water
Wash, after rubbing decortication, pulled out after being placed in hydrochloric acid solution 5-10 minutes, so as in high temperature, realize grape peeling in the short time.
However, above-mentioned decortication process has following many deficiencies：First, the alkali lye of high temperature, high concentration is easily to Portugal
Grape pulp causes more serious corrosion and causes that nutritional ingredient therein is destroyed, and causes consumption of raw materials too high, grape berry
Rough surface unsightly, color and luster yellowing, easy brown stain, and the extent of damage of wherein nutritional ingredient is higher；Secondly, high-temperature process makes
Obtain grape berry and undesirable softening occurs, the grape berry mouthfeel obtained by causing is not good enough；Again, the alkali of high temperature, high concentration
Quality requirement of the liquid not only to peeling equipment is high, and also more strict to the control requirement of decortication process parameter, causes life
Produce relatively costly.
Chinese patent literature CN87103179 discloses a kind of chemical peeling side for plant products such as fruits and vegetables
Method, the method is carried out in insulation and closed container；Wherein, the plant products such as processed water fruits and vegetables are immersed in and are added
In added with the treatment fluid that ethanol is penetration-assisting agent, the treatment fluid is added with the caustic alkali of 2-25% (by weight), and treatment temperature exists
Below the boiling point of ethanol, process time was maintained in the range of 0.5-15 minutes.The patent document is disclosed, using this peeling side
The water such as apple, pears, Kiwi berry, carrot and potato fruits and vegetables have been carried out peeling experiment by method, obtain good peeling effect
Really, but do not refer to wherein and peeling treatment is carried out to grape using the method.
In addition, although the patent carries out peeling treatment at relatively low temperature, yet with use including
The mixed treating liquid of caustic alkali and ethanol, therefore there is following defect in it：Firstly it is difficult to the caustic alkali in the mixed treating liquid
Separated with ethanol and recycled, cause production cost high and not enough environmental protection；Secondly, after being processed through the mixed treating liquid,
Substantial amounts of alcohol can be adhered on peeling fruits and vegetables, in ensuing fruits and vegetables cleaning process, these alcohol are arranged with rinse water
It is put into sewage disposal system so that the inactivation of bacteria in the sewage disposal system, sewage treatment capacity declines even to be lost；Again
It is secondary, because caustic alkali and ethanol are mixed, making it difficult to while pair parameter relevant with caustic alkali and ethanol (such as its concentration)
Accurately controlled, cause to be generally unable to reach desired decortication effect.
The content of the invention
For above-mentioned the deficiencies in the prior art, the first aspect of the present invention provides a kind of canned grape preparation method, its
It is middle grape is removed the peel using environmentally friendly, inexpensive and easily controllable chemical peeling technique.
The first aspect of the present invention provides a kind of preparation method of canned grape, including following grape peeling step：
(1) grape to be removed the peel is contacted with alcoholic solution；
(2) the grape (1) processed through step is contacted with alkalescence peeling liquid；Wherein, by weight, hydrogen in alkalescence peeling liquid
The concentration of sodium oxide molybdena and/or potassium hydroxide is 1-15%, more preferably preferably 3-12%, 6-10%.
In above-mentioned technical proposal, grape can be made to be removed the peel with alcoholic solution, alkalescence respectively by way of spraying or soaking
Liquid is contacted；Wherein, it is preferred to use immersion way, with so that alcoholic solution, alkalescence peeling both liquid can fill to grape respectively
Divide and quickly treatment.In the present invention, the Main Function of alcoholic solution is the wax layer for dissolving Grape Skin surface, in making step (2)
Alkalescence peeling liquid it is readily permeable enter Grape Skin and by its erosion removal or by it between grape berry pectin substance corrosion it is molten
Solve and removed the peel.
In above-mentioned technical proposal, firstly, since employing substep decortication process, alcoholic solution and alkalescence peeling liquid are mutual
Separate, thus alcoholic solution and alkalescence peeling liquid can be reclaimed and reused respectively, to reduce production cost, and
Avoid the pollution of alcohol and alkalescence peeling liquid to environment.Secondly, grape sequentially passes through the treatment of alcoholic solution and alkalescence peeling liquid,
The alcohol remained on grape after being processed through alkalescence peeling liquid is extremely micro so that in ensuing grape cleaning process
In, be only substantially negligible the alcohol disregarded and be discharged into sewage disposal system with rinse water, therefore will not produce because
Excessive alcohol is discharged into sewage disposal system and causes its sewage treatment capacity to decline the problem even lost.Again, by
It is separated from each other in alcoholic solution and alkalescence peeling liquid, it is thus possible to respectively to alcoholic solution and concentration, the temperature of alkalescence peeling liquid
Carry out precise control and regulation, and the situation such as kind and size depending on grape is adjusted in good time, to reach more preferably decortication effect (example
Such as so that grape berry is smooth complete with more preferably color and luster, surface).
Further, it is of the invention compared with using the mixing decortication method for including the mixed treating liquid of caustic alkali and ethanol
Substep decortication method can shorten the time of contact of grape and alkalescence peeling liquid so that corrosion phase of the alkalescence peeling liquid to grape berry
Should reduce, consumption of raw materials reduction, and grape berry preferably maintains its initial color and luster, nutrition and taste.On the other hand,
When the mixed treating liquid using alcohol and caustic alkali, it is necessary to the contact that grape and treatment fluid carry out the longer time could be completed
Peeling, and then cause that treatment fluid causes excessive corrosion to grape berry, cause material loss to increase, and grape berry color and luster is poor
Easy brown stain, profile are coarse, nutritional ingredient is too lost in, and especially cause substantial amounts of Grape Skin and pectin substance to be deposited at mixing
In reason liquid, so that the viscosity of the mixed treating liquid is quickly increased to the degree for being unsuitable for using, mixed treating liquid is increased
Replacement frequency and cost.
Experiment shows, using substep decortication method of the invention, such as if being removed the peel in 1 ton of processing pond, and can be with
Continuous processing 130-150 tons of grape carries out the alkaline replacing for removing the peel liquid again, and (period requires supplementation with peeling liquid and keeps concentration and liquid
Position), and when using the mixing decortication method of the mixed treating liquid of caustic alkali and ethanol is included, the Portugal that about 70-80 tons of continuous processing
After grape, mixed treating liquid will become sticky and need to change.
As a kind of specific embodiment of the invention, step (1) in can control alcoholic solution in the concentration of ethanol be
5-40%, preferably 10-20%.
As another embodiment of the present invention, step (1) in can to control the temperature of alcoholic solution be 40-70
DEG C, preferably 55-65 DEG C.
In the present invention, by the control to alcoholic solution concentration and/or temperature, it can be ensured that Grape Skin surface wax coat has
There is dissolution velocity faster, and cause that alcohol volatile quantity is maintained at relatively low level.
Used as yet another embodiment of the invention, in step, (2) the middle temperature for controlling alkalescence to remove the peel liquid is 40-70 DEG C,
Preferably 55-65 DEG C.
Preferably, the temperature of alcoholic solution and alkalescence peeling liquid may be controlled to substantially the same.It is such to be advantageous in that,
The grape that peeling can be treated using alcoholic solution carries out the pre-heat treatment so that can step (2) in be relatively easy to and exactly
The temperature of alkalescence peeling liquid is maintained into predetermined numerical value, to reach desired decortication effect.
In above-mentioned technical proposal, the temperature of the temperature well below alkali lye in patent document CN91106407.9 of alkalescence peeling liquid
Degree (up to 90-100 DEG C).It is such to be advantageous in that：First, this can reduce alkalescence peeling liquid to the excessive corrosion of grape berry and
The destruction of nutrient component damages and chlorophyll caused by high temperature, preferably to keep the nutritional ingredient in grape berry, and makes
Obtaining grape berry has complete bright and clean profile and grass green color and luster；Secondly, the treatment of lower temperature also enables grape berry
It is enough preferably to keep its initial hardness mouthfeel and color and luster；Again, the quality requirement to peeling equipment is reduced, it is ensured that product matter
The stability of amount, reduces material loss and subsequently selects the input of defective products manpower, reduces production cost.
In the present invention, the peeling activator containing aliphatic acid and/or soap can be added in alkalescence peeling liquid；With
Weight meter, the addition for removing the peel activator is the 0.1-0.8%, preferably 0.2-0.5% of alkalescence peeling liquid.
In above-mentioned technical proposal, the aliphatic acid in peeling activator is acted on alkali, is generated as anion surfactant
Soap, wetting infiltration, dispersion and solubilization can be played, promote grape pomace and parenchyma cell layer to separate, with more preferable
Ground reaches peeling purpose；Or, peeling activator is included as the soap of anion surfactant, such as aliphatic acid
Alkylamine (carbon number 1-20) salt, alkanolamine (carbon number 2-12, such as mono-, di- and triethanolamine) salt, ammonium salt, alkaline-earth metal (calcium,
Magnesium etc.) salt and/or alkali metal (sodium, potassium etc.) salt etc..Further, peeling activator can also include such as Arlacel-20 (SP-
20) nonionic surface active agent.
Preferably, the aliphatic acid in above-mentioned technical proposal is laurate, soap is lauryl sulfate triethanol ammonium
At least one in salt, laurate sulfuric acid, lauryl sulfate sodium salt etc..
In a kind of specific embodiment of the invention, peeling activator includes that weight ratio is 1-3：1 surfactant
And auxiliary agent；Wherein, the surfactant includes that weight ratio is 1-3：1 laurate and Arlacel-20 (SP-20), the auxiliary agent includes
Weight ratio is 1-3：1-3：1 citric acid, sodium carbonate and sodium chloride.
The method of the present invention can also comprise the following steps：
(3) in the grape feeding decortication roller that will (2) be processed through step, control decortication roller is rotated and causes grape and grape
Between and/or grape and decortication roller between phase mutual friction, so as to will be attached to the Grape Skin on grape berry (but therebetween
Pectin substance be removed) separated with grape berry.
Preferably, decortication roller is using the decortication roller using rubber roller or Brush type, this decortication roller has
Working surface is soft and is difficult to injure the advantage of pulp.Wherein, decortication fraction time depending on exfoliant effect, to avoid rubbing
Degree of nuzzling up and injure the fiber network of grape endosexine；Decortication fraction time can be carried out by the rotating speed of roller of peeling and gradient
Adjustment.
Preferably, step (3) in also using clean water spray irrigation treatment is carried out to grape simultaneously, with centralized collection with
Grape Skin after grape berry separation, and reduce alkalescence peeling liquid and the other impurities remained on grape berry.
The above method can further include following steps：
(4) grape berry obtained from making (3) to be processed through step is the acid neutralization of 0.1-0.5% (by weight) with concentration
Liquid phase is contacted, to remove the residual alkali lye on grape berry surface；Wherein, acid neutralizer preferred concentration is 0.2-0.4% (with weight
Gauge) citric acid solution, be advantageous in that using citric acid solution, though exist on grape berry citric acid residual, also not
The quality of grape berry can be influenceed, because appropriate citric acid would generally be contained in canned grape product.
Preferably, (4) above-mentioned steps are carried out in bubble washer.This can not only reach more preferably neutralization,
And thoroughly cleaning further can be made to grape berry.Selectively, (4) above-mentioned steps can be carried out in service sink.
Preferably, the above method further includes following steps：
(5) the grape (4) processed through step is cooled to normal temperature by the clean water using water temperature less than 25 DEG C.Such benefit exists
In cooling treatment promptly can be carried out to grape berry, to keep the grass green color and luster of grape berry and reduce it to soften and nutrition
The loss of composition.
In the present invention, alcoholic solution and alkalescence peeling liquid can be reused, and the Pressure, Concentration, Temperature of the two can regard Portugal
The situations such as the kind and size of grape are adjusted in good time, and new liquid supplement can be added when usage amount reduction or concentration are reduced during use.
Accordingly, as preferred, the process step that according to size be classified grape before being additionally may included in step (1) by the above method
(such as by beam barrel type classifying equipoment), to be more accurately controlled concentration, temperature and the peeling time of peeling liquid, reaches optimal
Treatment effect.
Another aspect provides the canned grape prepared by a kind of any one preparation method more than.
The present invention can greatly improve production efficiency under the situation for not increasing raw material, administration fee, reduce production cost；
For example：Average productive capacity is only 12kg per hour for hand peeling, and in can preparation method of the invention, substep decortication process is every
Hour, every treatment line output was up to more than 1500kg.Also, after being processed through substep decortication process of the invention, grape berry
Color and luster and surface flatness uniformly unify, improve can yield while ensure that can quality.
In order to more clearly illustrate the objects, technical solutions and advantages of the present invention, with reference to specific embodiment to this
Invention is described in further detail.
Specific embodiment
Grape removes the peel embodiment 1
Raw material prepares：The fresh blue or green grape berry of 7 to 8 maturations is chosen, is careful not to injure the base of a fruit during harvesting place's pericarp, in order to avoid
Pulp is injured during peeling treatment；
It is alcohol-pickled：Grape fruit is soaked 2 points in concentration of alcohol is for the alcoholic solution of 12-15% (by weight)
Clock, wherein the temperature of control alcoholic solution is at about 60 DEG C；
Alkali lye loses skin：By the grape fruit after alcohol-pickled in concentration for the NaOH of 7-9% (by weight) is molten
Soaked 4 minutes in liquid and reach pericarp nigrescence cracking state, wherein the temperature of control sodium hydroxide solution is at about 60 DEG C；
Friction decortication：To be rapidly feeding in the decortication roller using rubber roller through the grape after alkali lye erosion skin so that grape
Between grape and/or grape and decortication roller between phase mutual friction, to slough grape pomace；Simultaneously using clean Water spray punching
Grape berry is washed, quickly to wash away its top layer alkali lye；
Acid solution is neutralized：Grape berry obtained from rubbed decortication is delivered in bubble washer, and is utilized wherein
Concentration is the residual alkali lye in the citric acid solution of 0.4% (by weight) and in grape berry, neutralizes time control at about 5 points
Clock；
Cooling is processed：Grape berry in alkali lye with after is delivered in cooling bay of the water temperature less than 20 DEG C, by grape
Pulp is quickly cooled to normal temperature, is then delivered to rear operation and is processed.
In above-described embodiment, 1 ton of peeling liquid can be with up to 150 tons Portugals of continuous processing in the case where the situation of concentration and liquid level is kept
Grape.Experiment shows that the grape berry obtained by embodiment 1 has good color and luster, and configuration of surface is relatively smooth and complete, and compared with
Its original local flavor, hardness and mouthfeel is kept well.
Grape removes the peel embodiment 2
Raw material prepares：The fresh blue or green grape berry of 7 to 8 maturations is chosen, is careful not to injure the base of a fruit during harvesting place's pericarp, in order to avoid
Pulp is injured during peeling treatment；
It is alcohol-pickled：Grape fruit is soaked 2 points in concentration of alcohol is for the alcoholic solution of 12-15% (by weight)
Clock, wherein the temperature of control alcoholic solution is at about 60 DEG C；
Alkali lye loses skin：Grape fruit after alcohol-pickled is 7-9%, removes the peel activator addition in naoh concentration
Measure for 0.3% (being by weight) alkalescence peeling liquid in immersion 3.5 minutes and reach pericarp nigrescence cracking state, wherein controlling
The temperature of alkalescence peeling liquid is at about 60 DEG C；
In each embodiment of the invention, peeling activator includes that weight ratio is 2：1 surfactant and auxiliary agent；Its
In, the surfactant includes that weight ratio is 2：1 laurate and Arlacel-20 (SP-20), the auxiliary agent includes that weight ratio is 2：2：
1 citric acid, sodium carbonate and sodium chloride.
Friction decortication：To be rapidly feeding in the decortication roller using rubber roller through the grape after alkali lye erosion skin so that grape
Between grape and/or grape and decortication roller between phase mutual friction, to slough grape pomace；Simultaneously using clean Water spray punching
Grape berry is washed, quickly to wash away its top layer alkali lye；
Acid solution is neutralized：Grape berry obtained from rubbed decortication is delivered in bubble washer, and is utilized wherein
Concentration is the residual alkali lye in the citric acid solution of 0.4% (by weight) and in grape berry, neutralizes time control at about 5 points
Clock；
Cooling is processed：Grape berry in alkali lye with after is delivered in cooling bay of the water temperature less than 20 DEG C, by grape
Pulp is quickly cooled to normal temperature, is then delivered to rear operation and is processed.
Experiment shows that the alkali lye erosion skin time in embodiment 2 substantially shortens compared with embodiment 1；Additionally, obtained by embodiment 2
Grape have than the more preferable color and luster of embodiment 1, more smooth and complete surface, and pulp local flavor and mouthfeel also than implement
Example 1 is slightly better.
Grape removes the peel embodiment 3
Raw material prepares：The fresh blue or green grape berry of 7 to 8 maturations is chosen, is careful not to injure the base of a fruit during harvesting place's pericarp, in order to avoid
Pulp is injured during peeling treatment；
It is alcohol-pickled：Grape fruit is soaked 3 minutes in concentration of alcohol is for the alcoholic solution of 5-10% (by weight),
Wherein the temperature of control alcoholic solution is at about 65 DEG C；
Alkali lye loses skin：Grape fruit after alcohol-pickled is 2-3%, removes the peel activator addition in naoh concentration
Measure for 0.1% (being by weight) alkalescence peeling liquid in immersion 6 minutes and reach pericarp nigrescence cracking state, wherein controlling alkali
Property peeling liquid temperature at about 70 DEG C；
Friction decortication：To be rapidly feeding in the decortication roller using rubber roller through the grape after alkali lye erosion skin so that grape
Between grape and/or grape and decortication roller between phase mutual friction, to slough grape pomace；Simultaneously using clean Water spray punching
Grape berry is washed, quickly to wash away its top layer alkali lye；
Acid solution is neutralized：Grape berry obtained from rubbed decortication is delivered in bubble washer, and is utilized wherein
Concentration is the residual alkali lye in the citric acid solution of 0.2% (by weight) and in grape berry, neutralizes time control at about 5 points
Clock；
Cooling is processed：Grape berry in alkali lye with after is delivered in cooling bay of the water temperature less than 20 DEG C, by grape
Pulp is quickly cooled to normal temperature, is then delivered to rear operation and is processed.
Grape removes the peel embodiment 4
Raw material prepares：The fresh blue or green grape berry of 7 to 8 maturations is chosen, is careful not to injure the base of a fruit during harvesting place's pericarp, in order to avoid
Pulp is injured during peeling treatment；
It is alcohol-pickled：Grape fruit is soaked 1 point in concentration of alcohol is for the alcoholic solution of 30-35% (by weight)
Clock, wherein the temperature of control alcoholic solution is at about 40 DEG C；
Alkali lye loses skin：By the grape fruit after alcohol-pickled naoh concentration be 13-15%, peeling activator add
Dosage reaches pericarp nigrescence cracking state for immersion 3 minutes in the alkalescence peeling liquid of 0.5% (being by weight), wherein controlling
The temperature of alkalescence peeling liquid is at about 40 DEG C；
Friction decortication：To be rapidly feeding in the decortication roller using rubber roller through the grape after alkali lye erosion skin so that grape
Between grape and/or grape and decortication roller between phase mutual friction, to slough grape pomace；Simultaneously using clean Water spray punching
Grape berry is washed, quickly to wash away its top layer alkali lye；
Acid solution is neutralized：Grape berry obtained from rubbed decortication is delivered in bubble washer, and is utilized wherein
Concentration is the residual alkali lye in the citric acid solution of 0.4% (by weight) and in grape berry, neutralizes time control at about 5 points
Clock；
Cooling is processed：Grape berry in alkali lye with after is delivered in cooling bay of the water temperature less than 20 DEG C, by grape
Pulp is quickly cooled to normal temperature, is then delivered to rear operation and is processed.
Grape removes the peel embodiment 5
Raw material prepares：The fresh blue or green grape berry of 7 to 8 maturations is chosen, is careful not to injure the base of a fruit during harvesting place's pericarp, in order to avoid
Pulp is injured during peeling treatment；
It is alcohol-pickled：Grape fruit is soaked 1 point in concentration of alcohol is for the alcoholic solution of 20-25% (by weight)
Clock, wherein the temperature of control alcoholic solution is at about 60 DEG C；
Alkali lye loses skin：By the grape fruit after alcohol-pickled naoh concentration be 10-12%, peeling activator add
Dosage reaches pericarp nigrescence cracking state for immersion 2.5 minutes in the alkalescence peeling liquid of 0.2% (being by weight), wherein controlling
The temperature of alkaline peeling liquid is at about 60 DEG C；
Friction decortication：To be rapidly feeding in the decortication roller using rubber roller through the grape after alkali lye erosion skin so that grape
Between grape and/or grape and decortication roller between phase mutual friction, to slough grape pomace；Simultaneously using clean Water spray punching
Grape berry is washed, quickly to wash away its top layer alkali lye；
Acid solution is neutralized：Grape berry obtained from rubbed decortication is delivered in bubble washer, and is utilized wherein
Concentration is the residual alkali lye in the citric acid solution of 0.2% (by weight) and in grape berry, neutralizes time control at about 5 points
Clock；
Cooling is processed：Grape berry in alkali lye with after is delivered in cooling bay of the water temperature less than 20 DEG C, by grape
Pulp is quickly cooled to normal temperature, is then delivered to rear operation and is processed.
Experiment shows, using the grape obtained by the method for above-described embodiment 3 to 5 be respectively provided with good color and luster, it is smooth and
Complete surface, and preferably maintain the initial flavor and mouthfeel of grape berry.
Grape removes the peel comparative example 1
Raw material prepares：The fresh blue or green grape berry of 7 to 8 maturations is chosen, is careful not to injure the base of a fruit during harvesting place's pericarp, in order to avoid
Pulp is injured during peeling treatment；
Mixing peeling：By grape fruit concentration of alcohol be 12-15%, naoh concentration be 7-9% (with weight
Meter) mixed treating liquid in immersion 6 minutes (alcohol-pickled and alkali lye loses the time sums of skin equivalent in embodiment 1) and reach
Pericarp nigrescence cracking state, wherein the temperature control of mixed treating liquid is at about 60 DEG C；
Friction decortication：Grape after blended peeling is rapidly feeding in the decortication roller using rubber roller so that grape
Between grape and/or grape and decortication roller between phase mutual friction, to slough grape pomace；Simultaneously using clean Water spray punching
Grape berry is washed, quickly to wash away its top layer alkali lye and ethanol；
Acid solution is neutralized：Grape berry obtained from rubbed decortication is delivered in bubble washer, and is utilized wherein
Concentration is the residual alkali lye in the citric acid solution of 0.4% (by weight) and in grape berry, and the neutralization time optionally controls
About 5 minutes；
Cooling is processed：Grape berry in alkali lye with after is delivered in cooling bay of the water temperature less than 20 DEG C, by grape
Pulp is quickly cooled to normal temperature.
In the method for comparative example 1,1 ton of caustic peeling liquid only can be with 80 tons of continuous processing in the case where concentration and liquid level is kept
Grape.Also, the mixing peeling step of comparative example 1 needs the process time longer than the alkali lye erosion skin step of embodiment 1, causes
Resulting grape berry color and luster is poor, is overstock because grape is overlapped, and dewaxing and erosion skin are completed simultaneously, and some laps are deposited
Not in place in the etch of round point shape, excessively, configuration of surface is coarse a small amount of residual skin phenomenon, operating process peeling for some part etches
The alcohol concentration and concentration of lye of mixed liquor are not easy to detection control and quasi- amount addition.
Grape removes the peel comparative example 2
This comparative example is with the difference of comparative example 1：In peeling step is mixed, it is in concentration of alcohol by grape fruit
12-15%, naoh concentration for 7-9% (being by weight) mixed treating liquid in soak about 4 minutes (equivalent to implementation
Alkali lye loses the time of skin step in example 1).
However, experiment shows, more there is the incomplete defect of peeling in the grape obtained by comparative example 2.
Canned grape compote embodiment
By by the grape tinning obtained by previous embodiment 1 to 5 any one decortication process, then through sweet water adding, sealing,
The steps known in those skilled in the art such as sterilized, cooling and be made canned grape compote.
Although depicting the present invention above by preferred embodiment, but it is to be understood that, those of ordinary skill in the art
Do not departing from invention scope of the invention, all equal improvement made according to the present invention should be protection scope of the present invention institute
Cover.
Claims (10)
1. a kind of canned grape preparation method, including following grape peeling step：
(1) grape to be removed the peel is contacted with alcoholic solution；
(2) the grape (1) processed through step is contacted with alkalescence peeling liquid；Wherein, by weight, hydrogen-oxygen in the alkalescence peeling liquid
The concentration for changing sodium and/or potassium hydroxide is 1-15%, more preferably preferably 3-12%, 6-10%.
2. the method for claim 1, wherein by weight, the ethanol in the step (1) middle control alcoholic solution
Concentration is 5-40%, preferably 10-20%.
3. the method for claim 1, wherein in step, (1) the middle temperature for controlling the alcoholic solution is 40-70 DEG C, excellent
Elect 55-65 DEG C as.
4. the method for claim 1, wherein in step, (2) the middle temperature for controlling the alkalescence to remove the peel liquid is 40-70 DEG C,
Preferably 55-65 DEG C.
5. the method for claim 1, wherein be with the addition of in the alkalescence peeling liquid and contain aliphatic acid and/or aliphatic acid
The peeling activator of salt；By weight, the addition of the peeling activator is the 0.1-0.8% of the alkalescence peeling liquid, excellent
Elect 0.2-0.5% as.
6. the method for claim 1, also comprises the following steps：
(3) in the grape feeding decortication roller that will (2) be processed through step, control decortication roller is rotated and caused between grape and grape
And/or phase mutual friction between grape and decortication roller, and using clean water spray irrigation treatment is carried out to grape simultaneously.
7. method as claimed in claim 6, further includes following steps：
(4) grape berry obtained from making (3) to be processed through step is with concentration for the acid of 0.1-0.5% (by weight) neutralizes liquid phase
Contact, to remove the residual alkali lye on grape berry；Wherein, the acid neutralizer preferred concentration is 0.2-0.4% (with weight
Meter) citric acid solution.
8. method as claimed in claim 7, wherein, (4) the step is carried out in bubble washer or service sink, its
In preferably use bubble washer.
9. method as claimed in claim 7, further includes following steps：
(5) the grape berry (4) processed through step is cooled to normal temperature by the clean water using water temperature less than 25 DEG C.
10. a kind of canned grape using as prepared by the preparation method of any one of claim 1 to 9.
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115428962A (en) * | 2021-06-03 | 2022-12-06 | 石黑康儿 | Peeling method for fruit epicarp or citrus endocarp |
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