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Preparation method of dried fructus gardeniae fruits

A gardenia fruit, drying technology, applied in the direction of preservation of fruits/vegetables by dehydration, preservation of fruits/vegetables by freezing/refrigeration, food processing, etc., can solve the problem of poor color, flavor, shape and texture of gardenia fruit, and technical complexity , low drying efficiency and other issues, to achieve the effect of maintaining good shape and texture, maintaining good color and high drying efficiency

Inactive Publication Date: 2017-10-24
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gardenia is mainly sold as fresh or dried fruit directly after picking. Since gardenia is harvested, the water content of fresh fruit is relatively high and the harvesting period is relatively concentrated, so there are problems such as large output, perishable, and difficult to store. It is processed by drying technology Gardenia is one of the important ways to preserve Gardenia, but the current drying techniques of Gardenia mainly include sun drying, drying (hot air drying), microwave drying, vacuum drying, etc., but all of them have low drying efficiency and can High consumption, long drying process, strong labor force, expensive equipment, complex technology, difficult to control and other problems, resulting in poor quality of the dried gardenia fruit, such as color, flavor, shape and texture, affecting the quality of the dried gardenia fruit Fat and yellow pigment content

Method used

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preparation example Construction

[0017] The present invention provides a method for preparing dried gardenia fruit, including the following steps:

[0018] Step 1: Blanch the fresh gardenia fruit;

[0019] Step 2: Use solar-assisted heat pump combined drying to dry the gardenia after blanching in step 1 until the dry basis moisture content of the gardenia is less than 8.5wt%;

[0020] Step 3: Cool the dried gardenia fruit in step 2 to below 25°C and store it at -4~5°C.

[0021] The working principle of the present invention is: the heat pump works according to the reverse Carnot cycle that can raise the low-grade heat energy to the usable level, but the heat pump drying uses electric energy, so the heat pump heating capacity is large in the large-scale drying, which causes the cost High; while solar drying is a process in which the radiant energy of solar energy is first converted into heat energy and then the moisture in the material is vaporized and diffused into the air, which is a process of "dehydration" heat an...

Embodiment 1

[0037] A method for preparing dried gardenia fruits includes the following steps:

[0038] Step 1: Choose fresh gardenia fruits of uniform size, uniform color, disease-free and intact;

[0039] Step 2: Put the fresh gardenia fruit selected in step 1 into hot water at a temperature of 90℃ for 16 minutes, and blanch it for 16 minutes. The material-liquid ratio of the gardenia fruit to the hot water is 1:20, and the unit of the material-liquid ratio is g / mL;

[0040] Step 3: Use solar-assisted heat pump combined drying to dry the blanched gardenias in step 2. The conditions for solar-assisted heat pump combined drying include a loading density of 0.4kg / m 2 , The drying temperature is 50℃, the rotating speed of the turntable is 2r / min, the drying is 36h, the moisture content of the converted dry base is 53.04%, and the moisture content of the dry base of the dried gardenia is 7.9wt%;

[0041] Step 4: Cool the dried gardenia fruit in step 3 to below 25°C and store it at -4~5°C.

[0042] Det...

Embodiment 2

[0046] A method for preparing dried gardenia fruits includes the following steps:

[0047] Step 1: Choose fresh gardenia fruits of uniform size, uniform color, disease-free and intact;

[0048] Step 2: Put the fresh gardenias selected in step 1 into hot water at a temperature of 100℃ and blanch for 4 minutes. The material-liquid ratio of the gardenias to the hot water is 1:20, and the unit of the material-liquid ratio is g / mL;

[0049] Step 3: Use solar-assisted heat pump combined drying to dry the blanched gardenias in step 2. The conditions for solar-assisted heat pump combined drying include a loading density of 0.4kg / m 2 , The drying temperature is 60°C, the rotating speed of the turntable is 6r / min, and the drying is 21h, the converted dry basis moisture content is 96.08%, and the dry basis moisture content of the dried gardenia is 8.0wt%;

[0050] Step 4: Cool the dried gardenia fruit in step 3 to below 25°C and store it at -4~5°C.

[0051] The fat and yellow pigment content of t...

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Abstract

The invention relates to the technical field of food processing, and aims to provide a preparation method of dried fructus gardeniae fruits. The preparation method comprises the following steps of step 1, blanching fresh fructus gardeniae fruits; step 2, drying the blanched fructus gardeniae fruits obtained in the step 1 through united drying of a solar-assisted heat pump until the water ratio of dry basis of the dried fructus gardeniae fruits is smaller than 8.5wt%; and step 3, cooling the dried fructus gardeniae fruits obtained in the step 2 to 25 DEG C or below, and placing the cooled fructus gardeniae fruits under the condition of minus 4-5 DEG C for storage. The drying method used in the preparation method disclosed by the invention has the advantages of being good in continuity, high in drying efficiency, and low in energy consumption (with the unit energy consumption being 15.12-20.88kJ / g). The color, the flavor, the shape and the texture of the dried fructus gardeniae fruits prepared by the method disclosed by the invention are maintained well, and the quality of the dried fructus gardeniae fruits is excellent.

Description

Technical field [0001] The invention relates to the technical field of food processing, in particular to a method for preparing dried gardenia fruit. Background technique [0002] Gardenia is an evergreen shrub of the genus Gardenia in the Rubiaceae family. The chemical composition of the gardenia fruit is abundant and has rich pharmacology and practicality. Gardenias are mainly sold directly after picking or dried fruits. As gardenias are harvested, the water content of fresh fruits is relatively high and the harvesting period is relatively concentrated, so there are problems such as large yield, perishable, and difficult to store. They are processed by drying technology. Gardenia is one of the important ways to preserve gardenia, but the current drying technology of gardenia mainly includes solarization, drying (hot air drying), microwave drying, vacuum drying, etc., but they all have low drying efficiency and energy High consumption, long drying process time, strong labor for...

Claims

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Application Information

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IPC IPC(8): A23B7/02A23B7/04
CPCA23B7/02A23B7/04Y02P60/85
Inventor 邓凯波代亚萍李智谢婷婷林少玲陈团伟黄建立郑宝东
Owner FUJIAN AGRI & FORESTRY UNIV
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