Method for preparing dehydrated avocados by microwave drying

A technology of microwave drying and avocado, which is applied in the direction of dehydration preservation of fruits/vegetables, preparation/refining of fatty acids, refining of fat oil/fat, etc. It can solve the problems of unable to adjust the capacity of the dryer, energy consumption, time consumption, etc.

Pending Publication Date: 2021-07-23
LAB EXPANSCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, drying methods to date (especially oven or hot air drying) are time- and energy-intensive, and there is no way to adjust the capacity of the dryer to variable quantities of avocados ten tons of avocados)

Method used

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  • Method for preparing dehydrated avocados by microwave drying
  • Method for preparing dehydrated avocados by microwave drying
  • Method for preparing dehydrated avocados by microwave drying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0183] Example 1: Microwave power

[0184] a) avocado

[0185] Offers fresh firm avocados of the Hass variety from Peru. The size of the fruit is about 200g.

[0186] b) Detailed experimental procedures

[0187] b1) Comparative example: oven dried fresh avocado (control)

[0188] The results of the control tests are shown in Table 1.

[0189] Table 1: Results of the control test of Example 1

[0190]

[0191] b2) Invention: Microwave drying of fresh avocados at laboratory scale:

[0192] Fresh hard avocados were cut into slices of 1 to 2 mm, and then immediately dried in a closed microwave oven (with a microwave generator) with a turntable, and the power of the microwave oven was successively adjusted to 600 to 5000W. Adjust the drying time according to the selected power to achieve a residual moisture of less than or equal to 5% without damaging the fruit. The microwave frequency was set to 2450 Hz and the air flow temperature was set to 20°C for the first 5 tes...

Embodiment 2

[0200] Example 2: Air Stream Temperature

[0201] a) avocado

[0202] Offers fresh avocados of the Hass variety from Chile, which are medium firm. The size of the fruit is about 200g.

[0203] b) Detailed experimental procedures

[0204] b1) Comparative example: oven dried fresh avocado (control)

[0205] The results of the control tests are shown in Table 3:

[0206] Table 3: Results of Control Tests of Example 2

[0207]

[0208] b2) Invention: Drying of fresh avocados by microwave on a pilot scale:

[0209] Use an electric slicer to cut about 550g of medium hardness (between 1 and 3kg / m 2Between ) fresh avocados were cut into 1 to 2mm slices and then immediately dried by an Extractor 200 with a 5L bowl and a microwave generator set at 1000W and 2450Hz frequency. A hot air generator ventilates the chamber. The average drying duration was about 22 minutes.

[0210] The various tests carried out made it possible to test the effect of the blown air temperature. ...

Embodiment 3

[0216] Example 3: Drying Duration

[0217] a) avocado

[0218] Offers fresh avocados of the Hass variety from Chile, which are medium firm. The size of the fruit is about 200g.

[0219] b) Detailed experimental procedures

[0220] b1) Comparative example: Oven-dried fresh avocado (control):

[0221] The results of the control tests are shown in Table 5:

[0222] Table 5: Results of the control test of Example 3

[0223]

[0224] b2) Invention: Drying of fresh avocados by microwave in continuous mode:

[0225] About 300 g of medium-firm fresh avocados are sliced ​​into 1 to 2 mm slices using an electric slicer and immediately dried in a continuous microwave oven with a conveyor belt and a microwave generator set at 3000W power and 2450Hz frequency . A hot air generator at 80°C ventilates the chamber.

[0226] The various tests performed made it possible to test the effect of drying duration.

[0227] Results (Table 6):

[0228] Table 6: Test results according to dr...

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Abstract

The present invention concerns a method for preparing dehydrated avocados, a method for preparing an unsaponifiable-rich avocado oil, a method for preparing an avocado cake rich in sugars and proteins, and a method for preparing an unsaponifiable fraction; these methods all comprising a step of drying avocado slices by means of microwaves until dehydrated avocados are obtained having residual moisture less than or equal to 5%; during this step, the water evaporated under the action of the microwaves being eliminated by a warm air stream with a temperature less than or equal to 80 DEG C and / or by air extraction.

Description

technical field [0001] The present invention belongs to the field of preparing dehydrated avocados and obtaining avocado oil from dehydrated avocados. [0002] The present invention more particularly relates to a method for preparing dehydrated avocado and a method for preparing avocado oil enriched in unsaponifiable matter, both methods comprising the step of drying the avocado by microwaves. Background technique [0003] Today, avocados are a common consumer food. Avocados are oil-rich because lipids make up 10% to 20% of the fresh fruit. The high fat content is one of the characteristics of this fruit. The oil has been used for many years in cosmetic and pharmaceutical applications. Furthermore, due to its nutritive properties, it is gaining interest as an edible oil or dietary supplement and its production is growing globally. [0004] Crude or virgin avocado oil is generally extracted through a cold-pressing process that involves blending the fresh fruit followed by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04A23L3/40A23L3/54C11B1/06C11B1/08C11B3/00C11B7/00C11C1/02A23L19/00
CPCA23L3/54A23L19/03A23L19/07C11B1/04C11B1/06C11B1/08C11B3/008C11B7/0075C11C1/025A23B7/02
Inventor G·勒克鲁罗尔D·托潘I·兰斯
Owner LAB EXPANSCIENCE
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