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Aquatic product freeze drying method with high rehydration rate

A drying method and vacuum freeze-drying technology, applied in the processing field of aquatic products, can solve problems such as rapid rehydration of aquatic products

Active Publication Date: 2017-09-26
张华山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to quickly rehydrate aquatic products after vacuum freeze-drying is still a difficult problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high rehydration rate freeze-drying method for aquatic products, the specific steps are as follows:

[0026] (1) The first vacuum freeze-drying: vacuum freeze-dry the pretreated aquatic products at 15Pa and -20°C;

[0027] (2) Soaking in the treatment solution: transfer the aquatic product after the first vacuum freeze-drying to the treatment solution and soak for 10 minutes, then take it out and drain, and irradiate with 75W microwave for 1 minute; wherein, the treatment solution is composed of the following parts by weight: Divided into: 1 part of shiitake mushroom extract, 3 parts of wakame extract, 12 parts of lemon juice, 20 parts of kiwi fruit juice, 60 parts of water;

[0028] (3) The second vacuum freeze-drying: vacuum freeze-drying under the conditions of 5Pa and -50°C.

[0029] Wherein, the pretreatment in step (1) includes washing and draining water, and removing impurities such as sand and gravel mixed in the aquatic product during washing. Pre-freeze be...

Embodiment 2

[0033] A high rehydration rate freeze-drying method for aquatic products, the specific steps are as follows:

[0034] (1) The first vacuum freeze-drying: vacuum freeze-dry the pretreated aquatic product at 20Pa and -25°C;

[0035] (2) Soaking in the treatment solution: transfer the aquatic product after the first vacuum freeze-drying to the treatment solution and soak for 20 minutes, then take it out and drain, and irradiate with 100W microwave for 2 minutes; wherein, the treatment solution is composed of the following components by weight: Divided into: 1 part of shiitake mushroom extract, 4 parts of wakame extract, 15 parts of lemon juice, 30 parts of kiwi fruit juice, 80 parts of water;

[0036] (3) The second vacuum freeze-drying: vacuum freeze-drying under the conditions of 10Pa and -55°C.

[0037] Wherein, the pretreatment in step (1) includes washing and draining water, and removing impurities such as sand and gravel mixed in the aquatic product during washing. Pre-fr...

Embodiment 3

[0041] A high rehydration rate freeze-drying method for aquatic products, the specific steps are as follows:

[0042] (1) The first vacuum freeze-drying: vacuum freeze-dry the pretreated aquatic products at 15Pa and -25°C;

[0043] (2) Soaking in the treatment solution: transfer the aquatic product after the first vacuum freeze-drying to the treatment solution and soak for 10 minutes, then take it out and drain, and irradiate with 100W microwave for 1 minute; wherein, the treatment solution is composed of the following components by weight: Divided: 1 part of shiitake mushroom extract, 4 parts of wakame extract, 12 parts of lemon juice, 30 parts of kiwi fruit juice, 60 parts of water;

[0044] (3) The second vacuum freeze-drying: vacuum freeze-drying under the conditions of 10Pa and -50°C.

[0045] Wherein, the pretreatment in step (1) includes washing and draining water, and removing impurities such as sand and gravel mixed in the aquatic product during washing. Pre-freeze ...

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PUM

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Abstract

The invention discloses an aquatic product freeze drying method with a high rehydration rate. The aquatic product freeze drying method is characterized by comprising the following steps: (1) primary vacuum freeze drying: vacuum freeze drying a preprocessed aquatic product at 15 to 20 Pa and 20 to 25 DEG C; (2) soaking in a processing solution, transferring the aquatic product after the primary vacuum freeze dried into the processing solution, soaking for 10 to 20 minutes, then taking out the aquatic product, draining, and irradiating the aquatic product with microwaves of 75W to 100W for 1 to 2 minutes, wherein the processing solution is prepared from the following components in parts by weight: 1 part of shiitake mushroom extract, 3 to 4 parts of undaria pinnatifida extract, 12 to 15 parts of lemon juice, 20 to 30 parts of kiwi fruit juice, and 60 to 80 parts of water; and (3) secondary vacuum freeze drying: vacuum freeze drying at 5 to 10 Pa and -50 to 55 DEG C.

Description

technical field [0001] The invention relates to a method for freeze-drying aquatic products, in particular to a method for freeze-drying aquatic products with high rehydration rate. The invention belongs to the technical field of processing aquatic products. Background technique [0002] Aquatic products are rich in oil and protein, and some oil content even exceeds 30% of their own weight. Oil and protein are easily oxidized during the storage of aquatic products, resulting in discoloration, deterioration and corruption of aquatic products. Therefore, the preservation method of aquatic products is particularly important. [0003] At present, the storage of aquatic products at home and abroad mainly adopts the method of low-temperature freezing, that is, the living environment of microorganisms parasitic on aquatic products is controlled by low-temperature means, and the aquatic products are prevented from rotting due to the existence of parasitic microorganisms. However, ...

Claims

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Application Information

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IPC IPC(8): A23B4/037A23B4/20A23B4/015
CPCA23B4/015A23B4/037A23B4/20A23V2002/00A23V2250/21A23V2250/208A23V2250/202
Inventor 张华山
Owner 张华山
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