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Preparation method of freeze-drying fructus lycii

A wolfberry and freeze-drying technology, which is applied in food preservation, fruit and vegetable preservation, food science, etc., can solve the problems of moldy and rotten fresh fruit of wolfberry, loss of nutrients, and unsuitable long-term storage, so as to shorten the freezing time, make it easier to crush, and avoid Effect of destruction and loss of active ingredient

Inactive Publication Date: 2021-04-09
湖北金贵中药饮片有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fresh goji berries are prone to mildew and rot, and are not suitable for long-term storage. Therefore, nearly 90% of fresh goji berries are processed into dried fruits every year. However, many problems will be caused in the process of processing fresh goji berries into dried fruits: In addition, the color of dried fruit will become darker, the flavor will be lost, the product will shrink severely, and the surface will form a hard shell, the added value of the product will be low, and the shelf life will be short

Method used

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  • Preparation method of freeze-drying fructus lycii
  • Preparation method of freeze-drying fructus lycii
  • Preparation method of freeze-drying fructus lycii

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Freeze-dried wolfberry is prepared as follows:

[0039] S1, pretreatment of fresh wolfberry: quickly pass fresh wolfberry through water vapor, and steam for 10 seconds;

[0040] S2, pulverization: putting the wolfberry steamed in step S1 into a pulverizer and pulverizing until pulverized into a gelatinous solid, the gelatinous solid is visible pulp, but it does not have fluidity;

[0041] S3, pre-freezing: the wolfberry gel prepared in step S2 is placed on the vacuum freeze dryer tray, and the vacuum freeze dryer compressor is started for refrigeration. The pre-freezing step includes two stages: the first stage, pre-freezing temperature The freezing time is 1.5h when the temperature is lowered to -25~-45℃; in the second stage, the pre-freezing temperature is lowered to -45~-60℃, and the freezing time is 1.5h;

[0042] S4, vacuum drying: after the pre-freezing in step S3 is completed, turn on the vacuum pump, then vacuum the freeze-drying chamber with a vacuum gauge, an...

Embodiment 2

[0048] Freeze-dried wolfberry is prepared as follows:

[0049] S1, pretreatment of fresh wolfberry: quickly pass fresh wolfberry through water vapor, and steam for 15 seconds;

[0050] S2, pulverization: putting the wolfberry steamed in step S1 into a pulverizer and pulverizing until pulverized into a gelatinous solid, the gelatinous solid is visible pulp, but it does not have fluidity;

[0051] S3, pre-freezing: the wolfberry gel prepared in step S2 is placed on the vacuum freeze dryer tray, and the vacuum freeze dryer compressor is started for refrigeration. The pre-freezing step includes two stages: the first stage, pre-freezing temperature When the temperature drops to -25~-45℃, the freezing time is 2 hours; in the second stage, the pre-freezing temperature drops to -45~-60℃, and the freezing time is 2 hours;

[0052] S4, vacuum drying: after the pre-freezing in step S3 is completed, turn on the vacuum pump, then vacuum the freeze-drying chamber with a vacuum gauge, and c...

Embodiment 3

[0058] Freeze-dried wolfberry is prepared as follows:

[0059] S1, pretreatment of fresh wolfberry: quickly pass fresh wolfberry through water vapor, and steam for 20s;

[0060] S2, pulverization: putting the wolfberry steamed in step S1 into a pulverizer and pulverizing until pulverized into a gelatinous solid, the gelatinous solid is visible pulp, but it does not have fluidity;

[0061] S3, pre-freezing: place the wolfberry gel prepared in step S2 on the tray of a vacuum freeze dryer,

[0062] Start the compressor of the vacuum freeze dryer for refrigeration. The pre-freezing step includes two stages: the first stage, the pre-freezing temperature drops to -25~-45°C, and the freezing time is 1h; the second stage, the pre-freezing temperature drops to -45°C ~-60℃, freezing time is 2h;

[0063] S4, vacuum drying: after the pre-freezing in step S3 is completed, turn on the vacuum pump, then vacuum the freeze-drying chamber with a vacuum gauge, and control the refrigeration tem...

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Abstract

The invention discloses a preparation method of freeze-drying fructus lycii. The preparation method comprises the following steps of: S1: preprocessing fresh fructus lycii; S2: carrying out grinding; S3: carrying out pre-freezing; S4: carrying out vacuum drying; S5: carrying out grinding and sieving; S6: carrying out granulation; S7: carrying out sterilization; and S8: carrying out packaging. The freeze-drying fructus lycii prepared by the preparation method has the following advantages that: 1) the freeze-drying fructus lycii is prepared through a vacuum freeze drying method, the method can improve drying efficiency and shorten drying duration so as to lower freeze-drying energy consumption, through a vacuum freeze drying process, the effective ingredients of the fructus lycii are kept to a maximum extent, and the quality of a product is guaranteed; 2) an anti-caking agent is added, the moisture resistance and the evenness of the product are simultaneously improved, and preservation time is prolonged; and 3) spray drying granulation can be adopted to improve the evenness and the liquidity of fructus lycii particles, the expiration date of the product is prolonged, since an aluminium foil bag is adopted to carry out packaging, a situation that fructus lycii particles absorb moisture to go bad can be effectively alleviated, and the freeze-drying fructus lycii at least can be preserved for 1-2 years at the constant temperature.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a preparation method of freeze-dried wolfberry. Background technique [0002] Lycium barbarum belongs to the homologous varieties of medicine and food announced by the Ministry of Health. It contains a variety of active substances, which have pharmacological effects in enhancing immunity, anti-aging, anti-tumor, and anti-oxidation. It is an ideal medicinal edible plant resource. In recent years, people have had a clear understanding of the types and functions of the main active substances in wolfberry. It is generally believed that there are four main types of bioactive components in wolfberry: one is carotenoids, which have antioxidant and anti-aging properties, and play an important role in preventing free radical damage, cardiovascular disease and cancer; the other is beet Alkali (Betaine) is a very important osmotic adjustment substance, which acts as a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L19/00A23B7/024A23B7/144A23B7/148
CPCA23L19/01A23B7/024A23B7/144A23B7/148
Inventor 杨群彭璐孔庆雨付伟陶然胡熠
Owner 湖北金贵中药饮片有限公司
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