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Fresh keeping method of garden lettuce based on storage in air-conditioned cold store

A fresh-keeping method and a technology of a controlled-atmosphere storage, which is applied to the fresh-keeping of fruits and vegetables, the preservation of food ingredients as antimicrobials, and the preservation of fruits/vegetables through freezing/refrigeration, etc., which can solve the difficulty in meeting the long-term fresh-keeping requirements of lettuce and the unsafe chemical preservation , susceptibility to germ infection and other problems, to achieve the effect of eliminating unsafe factors, inhibiting the activities of harmful organisms, and reducing water loss

Inactive Publication Date: 2018-10-12
WUXI HAIHE EQUIP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lettuce has high water content, is perishable, and is susceptible to infection by pathogens. Especially after picking, its own physiological metabolism is active and has a high respiratory intensity. If it is not stored properly, it will quickly deteriorate, yellow, shrink, and become inedible.
At present, the fresh-keeping methods for lettuce mainly include low-temperature storage, controlled-atmosphere storage, and chemical fresh-keeping. Long-term preservation requirements for lettuce in such places
However, there are unsafe factors in chemical preservation, which is difficult to be accepted by people.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare the air-conditioned refrigerator and the required number of hollow baskets first, and clean and disinfect the air-conditioned refrigerator.

[0025] Then, set the storage temperature of the controlled atmosphere refrigerator so that it reaches the ice temperature in advance. The ice temperature is -0.5°C.

[0026] After that, put the picked lettuce at a temperature of 2°C for low-temperature pre-cooling to remove field heat.

[0027] After that, select the lettuce that has been removed from the heat in the field, and remove the lettuce with pests and diseases and mechanical damage.

[0028] Afterwards, put the selected lettuce into the hollow basket, and put a perforated fresh-keeping bag outside the hollow basket with lettuce, so as to slow down the lettuce's dehydration wilting and lettuce rot caused by condensed water dripping in the warehouse.

[0029] Afterwards, the hollowed-out baskets with lettuce covered with fresh-keeping bags are stacked into the ai...

Embodiment 2

[0038] Prepare the air-conditioned refrigerator and the required number of hollow baskets first, and clean and disinfect the air-conditioned refrigerator.

[0039] Then, set the storage temperature of the controlled-atmosphere refrigerator so that it reaches the ice temperature in advance; the ice temperature is -1°C.

[0040] Afterwards, put the picked lettuce at a temperature of 0°C for low-temperature pre-cooling to remove field heat.

[0041] After that, select the lettuce that has been removed from the heat in the field, and remove the lettuce with pests and diseases and mechanical damage.

[0042] Afterwards, put the selected lettuce into the hollow basket, and put a perforated fresh-keeping bag outside the hollow basket with lettuce, so as to slow down the lettuce's dehydration wilting and lettuce rot caused by condensed water dripping in the warehouse.

[0043] Afterwards, the hollowed-out baskets with lettuce covered with fresh-keeping bags are stacked into the air-c...

Embodiment 3

[0052] Prepare the air-conditioned refrigerator and the required number of hollow baskets first, and clean and disinfect the air-conditioned refrigerator.

[0053] Then, set the storage temperature of the controlled-atmosphere refrigerator so that it reaches the ice temperature in advance; the ice temperature is 0°C.

[0054] After that, put the picked lettuce at a temperature of 4°C for low-temperature pre-cooling to remove field heat.

[0055] After that, select the lettuce that has been removed from the heat in the field, and remove the lettuce with pests and diseases and mechanical damage.

[0056] Afterwards, put the selected lettuce into the hollow basket, and put a perforated fresh-keeping bag outside the hollow basket with lettuce, so as to slow down the lettuce's dehydration wilting and lettuce rot caused by condensed water dripping in the warehouse.

[0057] Afterwards, the hollowed-out baskets with lettuce covered with fresh-keeping bags are stacked into the air-co...

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Abstract

The invention relates to a fresh keeping method of garden lettuce based on storage in an air-conditioned cold store. The fresh keeping method is characterized by sequentially comprising the followingsteps of preparing an air-conditioned cold store and hollow baskets, cleaning the air-conditioned cold store and performing disinfection, setting the temperature of the air-conditioned cold store, performing low-temperature precooling and selecting on picked garden lettuce, loading selected garden lettuce in the hollow baskets, sleeving the hollow baskets loaded with the garden lettuce with perforated fresh keeping bags, putting the hollow baskets which are loaded with the garden lettuce and sleeved with the fresh keeping bags in the air-conditioned cold store at intervals in a laying manner,sterilizing the garden lettuce in the air-conditioned cold store with ozone, storing the garden lettuce in two stages of the first 10 days and days after the first 10 days, maintaining the humidity inthe air-conditioned cold store to be 80-95% with a humidifier in the air-conditioned cold store and the like. Through the fresh keeping method, the fresh keeping time of the garden lettuce can be prolonged, the long-time fresh keeping requirements of the garden lettuce in places of ocean vessels can be met, unsafe factors are eliminated, and the fresh keeping method can be accepted by people. Thefresh keeping method is suitable for storage and fresh keeping of the garden lettuce in the ocean vessels.

Description

technical field [0001] The invention relates to a fresh-keeping method for fruits and vegetables. Specifically, it is a method of preserving freshness of lettuce by combining ice temperature and dynamic controlled atmosphere storage. It is especially suitable for the storage and preservation of lettuce on ocean-going ships. Background technique [0002] Lettuce, commonly known as leaf lettuce, is an annual or biennial herb crop, which can be eaten raw or cooked, and is a common edible vegetable. It is rich in dietary fiber, vitamin C, lettuce, mannitol and other nutrients, and has the effects of promoting digestion, lowering cholesterol, and promoting blood circulation. Therefore, it is deeply loved by people. However, lettuce has high water content, is perishable, and is susceptible to infection by germs. Especially after picking, its own physiological metabolism is active and has a high respiratory intensity. If it is not stored properly, it will quickly deteriorate, ye...

Claims

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Application Information

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IPC IPC(8): A23B7/04A23B7/148A23B7/152
CPCA23B7/0425A23B7/148A23B7/152A23V2002/00A23V2200/10A23V2250/128
Inventor 潘怡丹过志梅过叶青于曼刘婧陈瑜过晓刚
Owner WUXI HAIHE EQUIP TECH CO LTD
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