CN108402173A - A kind of blueberry preserved method - Google Patents
A kind of blueberry preserved method Download PDFInfo
- Publication number
- CN108402173A CN108402173A CN201810324098.4A CN201810324098A CN108402173A CN 108402173 A CN108402173 A CN 108402173A CN 201810324098 A CN201810324098 A CN 201810324098A CN 108402173 A CN108402173 A CN 108402173A
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- China
- Prior art keywords
- temperature
- blueberry
- cooling
- maintains
- microwave
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/04—Freezing; Subsequent thawing; Cooling
- A23B7/0425—Freezing; Subsequent thawing; Cooling the material not being transported through or in the apparatus, with or without shaping, e.g. in the form of powder, granules or flakes
- A23B7/0433—Freezing; Subsequent thawing; Cooling the material not being transported through or in the apparatus, with or without shaping, e.g. in the form of powder, granules or flakes with packages or with shaping in the form of blocks or portions
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/04—Freezing; Subsequent thawing; Cooling
- A23B7/0441—Treatment other than blanching preparatory to freezing
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Storage Of Fruits Or Vegetables (AREA)
Abstract
The invention discloses a kind of blueberry preserved methods.The method of the present invention is will be before blueberry progress freeze preservation, it is 2455MHz to put it into microwave frequency, 45 75s are handled in the microwave box that electrical power is 1100W, then the Blueberry after microwave treatment is frozen into 18 DEG C from initial temperature using gradient temperature, the cooling freezing rate of initial temperature to 0 DEG C of temperature range is 6 DEG C/min, and temperature maintains 0 DEG C of constant 3min after reducing；The cooling freezing rate of 0 DEG C to 5 DEG C of temperature range is 10 DEG C/min, and maintains 5 DEG C of invariant times of temperature for 5min after cooling terminates；The cooling freezing rate of 5 DEG C to 18 DEG C of temperature range is 15 DEG C/min, and temperature maintains 18 DEG C of constant 8min after reducing.The blueberry preserved method of the present invention can ensure that fruit cell is complete, and the fresh-keeping period significantly extends, and operation processing means are simple, of low cost.
Description
Technical field
The present invention relates to field of fruit freshness keeping, and more specifically, it relates to a kind of blueberry preserved methods.
Background technology
Blueberry is because its unique flavor and alimentary health-care function are very popular, therefore blueberry industry obtains in China
It is fast-developing.But blueberry harvest time concentrates on the summer of high temperature and rainy, if processing is not in time, adopts rear vigorous breathing
Effect and infecting for microorganism can make its fast rotting rotten, and blueberry quality decline causes a large amount of waste, institute than more serious
With higher requirements are also raised for blueberry preserved.Traditional preservation method is broadly divided into two kinds of cold storing and fresh-keeping and freeze preservation
Mode, for the cold storing and fresh-keeping of blueberry, main problem is that the fresh-keeping period is short, and fruit is easy to rot, the direct shadow of these drawbacks
The market quality and economic benefit of blueberry are rung；For the freeze preservation of blueberry, due to blueberry be down in its temperature it is below freezing,
Moisture can form larger ice crystal when being down to low temperature in fruit cell, and larger ice crystal can puncture cell wall, cause cell wall
It destroys, cell tissue is made to be damaged, cause fruit quality decline.
Invention content
The present invention is provided a kind of using microwave increase Blueberry cell to overcome shortcoming in the prior art
The energy of thermal motion of internal moisture and the method for ladder frozen cooling can keep fruit cell complete in chilled storage
Whole, best in quality blueberry preserved method.
The present invention is achieved through the following technical solutions：
A kind of blueberry preserved method, before blueberry is carried out freeze preservation, it is 2455MHz, electricity to put it into microwave frequency
45-75s is handled in the microwave box that power is 1100W, increases the energy of thermal motion of Blueberry cell interior moisture, then uses
Blueberry after microwave treatment is frozen into -18 DEG C by gradient temperature from initial temperature, and the temperature in entire cooling section is divided into
Initial temperature is to 0 DEG C, 0 DEG C to -5 DEG C and -5 DEG C to -18 DEG C three temperature ranges, the drop of initial temperature to 0 DEG C of temperature range
Warm freezing rate is 6 DEG C/min, and temperature maintains 0 DEG C of constant 3min after reducing；The cooling freezing speed of 0 DEG C to -5 DEG C of temperature range
Rate is 10 DEG C/min, and maintains -5 DEG C of invariant times of temperature for 5min after cooling terminates；- 5 DEG C to -18 DEG C of humidity province
Between cooling freezing rate be 15 DEG C/min, temperature reduce after maintain -18 DEG C of constant 8min.
The present invention has the following technical effect that：
The Temperature Treatment of the entire freezing process blueberry of the present invention carries out in insulating box.Blueberry after treatment turns again
The freezer storage for entering -18 DEG C, to make its cell tissue will not be because of the moisture temperature in cell during fast freezing
The too low rupture for forming large ice crystals and leading to a large amount of cells inside it, to which the blueberry quality for keeping defrosting later is intact, product
It is of fine quality good.Such blueberry preserved method can ensure that fruit cell is complete, and the fresh-keeping period significantly extends, and operation processing means
Simply, of low cost.The present invention fully maintains its eating mouth feel and nutritive value, so that the commercial value of blueberry
It greatly improves.
Such blueberry preserved method can ensure that fruit cell is complete, and fresh-keeping effect is notable.Its fresh-keeping week can either be extended
Phase also allows for storing and transporting, while fruit cell can be made cell will not to be caused broken due to the too low formation large ice crystals of moisture cooling again
It splits, fully maintains its eating mouth feel and nutritive value, so that the commercial value of blueberry greatly improves, and it is grasped
It is simple to deal with means, it is low-cost without excessive addition additional processing equipment.
Specific implementation mode
Before blueberry is carried out freeze preservation by the blueberry preserved method of the present invention, it is 2455MHz, electricity to put it into microwave frequency
45-75s is handled in the microwave box that power is 1100W, increases the energy of thermal motion of Blueberry cell interior moisture, then uses
Blueberry after microwave treatment is frozen into -18 DEG C by gradient temperature from initial temperature, and the temperature in entire cooling section is divided into
Initial temperature is to 0 DEG C, 0 DEG C to -5 DEG C and -5 DEG C to -18 DEG C three temperature ranges, the drop of initial temperature to 0 DEG C of temperature range
Warm freezing rate is 6 DEG C/min, and temperature maintains 0 DEG C of constant 3min after reducing；The cooling freezing speed of 0 DEG C to -5 DEG C of temperature range
Rate is 10 DEG C/min, and maintains -5 DEG C of invariant times of temperature for 5min after cooling terminates；- 5 DEG C to -18 DEG C of humidity province
Between cooling freezing rate be 15 DEG C/min, temperature reduce after maintain -18 DEG C of constant 8min.Finally it is taken from insulating box
Go out, stores and carry out freezen protective in -18 DEG C of freezers.
Below in conjunction with specific embodiment, invention is further described in detail：
Embodiment 1:
(1) medium well blueberry is picked, fruit is laid on the bamboo mat of good air permeability, thickness about 3-5cm, with timely
Disperse field heat；Pick out mechanical damage, pest and disease damage, rotten and inferior Blueberry；Then put it into microwave box into
Row microwave treatment 30s, microwave frequency are set as 2455MHz, and electrical power is set as 1100W.
(2) blueberry that will be handled through step (1) is packed into plastic casing, and plastic casing is put into 0.04mm is thick, bale capacity is
In the PE freshness protection packages of 35cmx25cm, every bag is put into blueberry 500g, is put into insulating box the cooling freezing rate drop with 6 DEG C/min
To 0 DEG C, temperature maintains 0 DEG C of constant 3min after reducing；It then proceedes to be cooled to -5 DEG C with the cooling freezing rate of 10 DEG C/min,
And it is 5min that -5 DEG C of invariant times of temperature are maintained after cooling terminates；It is dropped again with the cooling freezing rate of 15 DEG C/min therewith
To -18 DEG C, temperature maintains -18 DEG C of constant 8min after reducing.It is taken out from insulating box finally, is stored in -18 DEG C of freezers
Carry out freezen protective.
After the chilled storage of blueberry, the organoleptic quality and nutritive value of the blueberry of defrosting are good, completely filled fruit, the hardness of fruit
1.40kg.cm-2, VC content 21mg/100g, titratable acid content 0.20%.
Embodiment 2:
(1) medium well blueberry is picked, fruit is laid on the bamboo mat of good air permeability, thickness about 3-5cm, with timely
Disperse field heat；Pick out mechanical damage, pest and disease damage, rotten and inferior Blueberry；Then put it into microwave box into
Row microwave treatment 45s, microwave frequency are set as 2455MHz, and electrical power is set as 1100W.
(2) blueberry that will be handled through step (1) is packed into plastic casing, and plastic casing is put into 0.04mm is thick, bale capacity is
In the PE freshness protection packages of 35cmx25cm, every bag is put into blueberry 500g, is put into insulating box the cooling freezing rate drop with 6 DEG C/min
To 0 DEG C, temperature maintains 0 DEG C of constant 3min after reducing；It then proceedes to be cooled to -5 DEG C with the cooling freezing rate of 10 DEG C/min,
And it is 5min that -5 DEG C of invariant times of temperature are maintained after cooling terminates；It is dropped again with the cooling freezing rate of 15 DEG C/min therewith
To -18 DEG C, temperature maintains -18 DEG C of constant 8min after reducing.It is taken out from insulating box finally, is stored in -18 DEG C of freezers
Carry out freezen protective.
After the chilled storage of blueberry, the organoleptic quality and nutritive value of the blueberry of defrosting are good, completely filled fruit, the hardness of fruit
1.49kg.cm-2, VC content 22mg/100g, titratable acid content 0.24%.
Embodiment 3:
(1) medium well blueberry is picked, fruit is laid on the bamboo mat of good air permeability, thickness about 3-5cm, with timely
Disperse field heat；Pick out mechanical damage, pest and disease damage, rotten and inferior Blueberry；Then put it into microwave box into
Row microwave treatment 60s, microwave frequency are set as 2455MHz, and electrical power is set as 1100W.
(2) blueberry that will be handled through step (1) is packed into plastic casing, and plastic casing is put into 0.04mm is thick, bale capacity is
In the PE freshness protection packages of 35cmx25cm, every bag is put into blueberry 500g, is put into insulating box the cooling freezing rate drop with 6 DEG C/min
To 0 DEG C, temperature maintains 0 DEG C of constant 3min after reducing；It then proceedes to be cooled to -5 DEG C with the cooling freezing rate of 10 DEG C/min,
And it is 5min that -5 DEG C of invariant times of temperature are maintained after cooling terminates；It is dropped again with the cooling freezing rate of 15 DEG C/min therewith
To -18 DEG C, temperature maintains -18 DEG C of constant 8min after reducing.It is taken out from insulating box finally, is stored in -18 DEG C of freezers
Carry out freezen protective.
After the chilled storage of blueberry, the organoleptic quality and nutritive value of the blueberry of defrosting are good, completely filled fruit, the hardness of fruit
1.51kg.cm-2, VC content 23mg/100g, titratable acid content 0.27%.
Claims (1)
1. a kind of blueberry preserved method, which is characterized in that the blueberry preserved method is before blueberry is carried out freeze preservation, to incite somebody to action
It is 2455MHz that it, which is put into microwave frequency, and 45-75s is handled in the microwave box that electrical power is 1100W, then uses gradient cooling will
Blueberry after microwave treatment is frozen into -18 DEG C from initial temperature, and the gradient cooling is by the temperature in entire cooling section
It is divided into initial temperature to 0 DEG C, 0 DEG C to -5 DEG C and -5 DEG C to -18 DEG C three temperature ranges, the temperature range of initial temperature to 0 DEG C
Cooling freezing rate be 6 DEG C/min, temperature reduce after maintain 0 DEG C of constant 3min；The cooling of 0 DEG C to -5 DEG C of temperature range is cold
Jelly rate is 10 DEG C/min, and maintains -5 DEG C of invariant times of temperature for 5min after cooling terminates；- 5 DEG C to -18 DEG C of temperature
The cooling freezing rate for spending section is 15 DEG C/min, and temperature maintains -18 DEG C of constant 8min after reducing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324098.4A CN108402173A (en) | 2018-04-12 | 2018-04-12 | A kind of blueberry preserved method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324098.4A CN108402173A (en) | 2018-04-12 | 2018-04-12 | A kind of blueberry preserved method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108402173A true CN108402173A (en) | 2018-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810324098.4A Pending CN108402173A (en) | 2018-04-12 | 2018-04-12 | A kind of blueberry preserved method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108402173A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706762A2 (en) * | 1994-10-11 | 1996-04-17 | Analyst Limited | Method for preserving fresh fruit and vegetable |
| CN107751356A (en) * | 2017-11-02 | 2018-03-06 | 天津商业大学 | A kind of method of the freeze preservation of grape |
-
2018
- 2018-04-12 CN CN201810324098.4A patent/CN108402173A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706762A2 (en) * | 1994-10-11 | 1996-04-17 | Analyst Limited | Method for preserving fresh fruit and vegetable |
| CN107751356A (en) * | 2017-11-02 | 2018-03-06 | 天津商业大学 | A kind of method of the freeze preservation of grape |
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Application publication date: 20180817 |
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