Industrialization preservation method of longans

A fresh-keeping method, longan technology, applied in the direction of fruit and vegetable preservation, food ingredients as antimicrobial preservation, food preservation, etc., can solve the problems of increased browning of pulp, not a fresh-keeping method, chemical pollution, etc., to maintain nutrition and flavor, Effectiveness of tackling spoilage and browning, safe process technology

Inactive Publication Date: 2017-09-19
台富科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of fresh-keeping method is easy to cause chemical pollution and fruit change of taste and color, and the shelf life is still short (7-10 days), which is relatively destructive to the quality of longan fruit, which is not enough to meet market demand, and is still not an ideal fresh-keeping method.
The second is the method of freezing longan pulp (CN201510572683.2), because the longan pulp directly contacts food additives or preservatives after peeling, there is still a certain degree of pulp browning and chemical pollution, and it is difficult to obtain high-quality and high-quality taste after thawing Longan pulp, so the operability is not strong

Method used

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  • Industrialization preservation method of longans
  • Industrialization preservation method of longans

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] S0. Longan raw material collection and selection:

[0034] Choose storage-resistant, high-quality "Chuliang" longan varieties, and further select eight-ripe fresh longan fruits, pick them with sterile plastic gloves, select fruits of uniform size and free of disease spots and insects, and remove the branches, leaves and stalks;

[0035] S1, cleaning and pre-cooling:

[0036] Longan is transported back in a refrigerated truck, cleaned with ice-filled water, and has a pre-cooling effect at the same time. The pre-cooling time is 15 minutes;

[0037] S2, drying and packaging:

[0038] Dry the washed longan, and package the longan fruit in a food-grade packaging bag with good airtightness at low temperature;

[0039] S3. Cooling and quick freezing:

[0040] Transfer the vacuum-packaged longan fruit to a cold storage to cool to 0°C, and then transfer it to a quick-freezer equipped with liquid nitrogen for 15 minutes.

[0041] S4. Packaging and frozen storage:

[0042] The frozen longan is ...

Embodiment 2

[0046] S0. Longan raw material collection and selection:

[0047] Choose storage-resistant, high-quality "Shixia" longan varieties, and further select eight mature fresh longan fruits, pick them with sterile plastic gloves, select fruits of uniform size and free of disease spots and insects, and remove the branches, leaves and stalks;

[0048] S1, cleaning and pre-cooling:

[0049] Longan is transported back in a refrigerated truck, cleaned with ice-filled water, and has a pre-cooling effect at the same time. The pre-cooling time is 20 minutes;

[0050] S2, drying and packaging:

[0051] Dry the washed longan, and package the longan fruit in a food-grade packaging bag with good airtightness at low temperature;

[0052] S3. Cooling and quick freezing:

[0053] Transfer the vacuum-packaged longan fruit to a cold storage to cool to 0°C, and then transfer it to a quick-freezer equipped with liquid nitrogen for 10 minutes.

[0054] S4. Packaging and frozen storage:

[0055] The frozen longan is ...

Embodiment 3

[0059] S0. Longan raw material collection and selection:

[0060] Choose storage-resistant, high-quality "Shixia" longan varieties, and further select eight mature fresh longan fruits, pick them with sterile plastic gloves, select fruits of uniform size and free of disease spots and insects, and remove the branches, leaves and stalks;

[0061] S1, cleaning and pre-cooling:

[0062] Longan is transported back in a refrigerated truck, cleaned with ice-filled water, and has a pre-cooling effect at the same time. The pre-cooling time is 25 minutes;

[0063] S2, drying and packaging:

[0064] Dry the washed longan, and package the longan fruit in a food-grade packaging bag with good airtightness at low temperature;

[0065] S3. Cooling and quick freezing:

[0066] Transfer the vacuum-packaged longan fruit to a cold storage to cool to 0°C, and then transfer it to a quick-freezer equipped with liquid nitrogen for a freezing time of 5 minutes.

[0067] S4. Packaging and frozen storage:

[0068] The...

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Abstract

The present invention relates to the technical field of food low temperature storage and more particularly relates to an industrialization preservation method of longans. The industrialization preservation method of the longans specifically comprises the following steps: S1, ice water precooling and washing; S2, packaging; S3, cooling and liquid nitrogen quick freezing; and S4, sealedly packaging and freezing storing. The method is low in freezing temperatures and rapid in speed, basically clears and inhibits spoilage microorganisms, enables tissue structures to be well preserved, maintains original nutrition and flavor, and effectively solves problems of spoilage and browning of the longan fruits after harvesting, enables the freezing processed longan fruits to have a shelf life up to one year or more, significantly extends a preservation period of the longan fruits, and realizes an industrial preservation of the longans.

Description

Technical field [0001] The invention relates to the technical field of food storage and fresh-keeping, in particular to an industrialized fresh-keeping method of longan. Background technique [0002] Longan is native to southern and southwestern China. It is a characteristic fruit in southern China. It has a long history of cultivation, and its cultivation area and yield are the largest in the world. Longan pulp is rich in nutrients such as protein, sugar and vitamins, and is rich in trace elements needed by the human body. It has the functions of nourishing the heart and calming the nerves, replenishing the spleen and appetizing, beautifying the skin, treating insomnia and palpitations. Longan matures in the summer high temperature and high humidity season. The physiological and biochemical changes of the fruit after harvesting increase and the microbial adhesion pollution, coupled with the characteristics of autolysis and qualitative change of the longan pulp, lead to a short p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/04A23B7/144A23B7/045A23B7/05
CPCA23B7/0441A23B7/045A23B7/05A23B7/144A23V2002/00A23V2200/10A23V2300/20
Inventor 方孝贤李唯正
Owner 台富科技(深圳)有限公司
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