Making method of dried apples

A technology for dried apples and apples, applied in the directions of food drying, preservation of fruits and vegetables, and functions of food ingredients, etc., can solve the problems of large loss of nutrients in apples, large changes in color and shape, and high production costs, and achieve good appearance and color, color and shape. Small change, the effect of ensuring crispy taste

Inactive Publication Date: 2018-05-18

王安明

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AI-Extracted Technical Summary

Problems solved by technology

Hot air drying is the most widely used processing method at present. The advantage is the lowest energy consumption. The disadvantage is that the nutritional components of apples are lost more and the color and shape change greatly; the apple slices made by vacuum freeze drying are...

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Abstract

The invention relates to a making method of dried apples. A making method of dehydrated apples comprises the following steps of (1) washing apple raw materials; (2) removing peel and cores from the washed apples; (3) cutting the apples obtained in the step (2) into slices, strips or small triangle dices; (4) performing color protection treatment on the apple blocks obtained in the step (3); (5) performing hot air drying on the apple blocks obtained in the step (4); (6) performing microwave drying on the half-dried apple blocks obtained in the step (5); (7) performing vacuum drying on the products obtained in the step (6); and (8) bagging the products obtained in the step (7), inflating nitrogen, and performing sealing so as to obtain the dehydrated apples. According to the making method disclosed by the invention, a combined type drying technology is applied in the process of making the dehydrated apples, so that the negative influences on color, luster and nutrient contents of the apples by long-time heating treatment are effectively avoided, and a dehydrated dried apple product with color and luster close to those of fresh fruits, with the original fragrance of the apples, beingcrisp in mouth feel, and which can be maintained at room temperature for two years or above without deterioration is obtained.

Application Domain

Fruits/vegetable preservation by heatingFood drying +2

Technology Topic

Nutrient contentEngineering +7

Examples

Experimental program(3)

Example Embodiment

[0022] Example 1: Preparation of dried apple slices using the method of the present invention

[0023] 1) Select fresh, non-rot, and disease-free apple raw materials and clean them;

[0024] 2) Peel and core the cleaned apple;

[0025] 3) Cut the apple obtained in step 2) into round slices perpendicular to the core direction, with a thickness of 5mm;

[0026] 4) Put the apple slices obtained in step 3) into the color protection solution for 15 minutes, adjust the pH value of the color protection solution to 3.1-3.5 with citric acid, and add 0.25% of citric acid;

[0027] 5) Take out the apple slices obtained in step 4), drain them, and spread them on the equipment for hot air drying at a temperature of 70°C and a time of 100 minutes;

[0028] 6) Microwave drying the semi-dried apple slices obtained in step 5), the microwave intensity is 2.5 W.g-1, and the dehydration time is 4 min.

[0029] 7) Vacuum dry the apple slices obtained in step 6), the vacuum degree is 0.06MPa, the temperature is 80°C, and the time is 4h;

[0030] 8) Pack the product obtained in step 7), flush with nitrogen, and seal to obtain the dried apple slices.

Example Embodiment

[0031] Example 2: Preparation of dried apple sticks using the method of the present invention

[0032] 1) Select fresh, non-rot, and disease-free apple raw materials and clean them;

[0033] 2) Peel and core the cleaned apple;

[0034] 3) Cut the apple obtained in step 2) into long strips parallel to the core direction, with a cross-sectional area of 100mm2;

[0035] 4) Put the apple strips obtained in step 3) into the color protection solution for 15 minutes, adjust the pH value of the color protection solution to 3.1-3.5 with citric acid, and add 0.25% of citric acid;

[0036] 5) Remove and drain the apple sticks obtained in step 4), and spread them on the equipment for hot air drying at a temperature of 80°C and a time of 150 minutes;

[0037] 6) Microwave drying the semi-dried apple slices obtained in step 5), the microwave intensity is 3W.g-1, and the dehydration time is 5min.

[0038] 7) Vacuum drying the apple slices obtained in step 6), the vacuum degree is 0.08MPa, the temperature is 80°C, and the time is 5h;

[0039] 8) Pack the product obtained in step 7), flush with nitrogen, and seal to obtain the dried apple sticks.

Example Embodiment

[0040] Example 3: Preparation of dried apple cubes using the method of the present invention

[0041] 1) Select fresh, non-rot, and disease-free apple raw materials and clean them;

[0042] 2) Peel and core the cleaned apple;

[0043] 3) Cut the apple obtained in step 2) into triangles;

[0044] 4) Put the diced apples obtained in step 3) into the color protection solution for 15 minutes, adjust the pH value of the color protection solution to 3.1-3.5 with citric acid, and add 0.25% of citric acid;

[0045] 5) Remove and drain the diced apples obtained in step 4), and spread them on the equipment for hot air drying at a temperature of 60°C and a time of 90 minutes;

[0046] 6) Microwave drying the semi-dried diced apple obtained in step 5), the microwave intensity is 2W.g-1, and the dehydration time is 4min.

[0047] 7) Vacuum drying the diced apple obtained in step 6), the vacuum degree is 0.06 MPa, the temperature is 60° C., and the time is 3 hours.

[0048] 8) Pack the product obtained in step 7), flush with nitrogen, and seal to obtain the dried apples.

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PUM

Property	Measurement	Unit
Thickness	2.0 ~ 10.0	mm
Thickness	5.0	mm
Cross-sectional area	100.0	mm²
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Crispy taste
Less loss of nutrients

Making method of dried apples

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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