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Decoloring method of apple dietary fibers

An apple dietary fiber and decolorization technology, which is applied in the field of food processing, can solve problems such as the limitation of ozone application, strong corrosion of hydrogen peroxide, and food safety issues, and achieve good decolorization effect, increased contact, and easy operation

Inactive Publication Date: 2015-04-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hydrogen peroxide oxidation is commonly used for decolorization, but hydrogen peroxide is highly corrosive, and if there is residue in food, it will damage human health and cause food safety problems. Therefore, the application of hydrogen peroxide oxidation decolorization in food has been questioned and restricted.
[0004] Ozone is a strong oxidizing agent and is widely used as a bleaching and decolorizing agent in the paper industry. However, due to the low solubility of ozone in aqueous solution, it cannot fully contact with dietary fiber, so the application of ozone in the field of dietary fiber decolorization is limited. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of decolorization method of apple dietary fiber, comprises the following steps:

[0023] 1) According to the ratio of solid to liquid of 1g:10ml, add apple pomace into sodium hydroxide solution with a mass concentration of 10%, and mix well to obtain a mixed liquid.

[0024] 2) At 40°C, according to the amount of ozone generated at 20g / h, use a silicone tube to pass ozone gas into the mixed material liquid, and at the same time, under the condition of ultrasonic power of 150W, decolorize the mixed material liquid, and the treatment time is 10h; the unreacted ozone and the gas discharged from the reaction are extracted by a fume hood.

[0025] 3) Use hydrochloric acid with a mass concentration of 36% to adjust the pH value of the decolorized feed solution to neutral, and then centrifuge it for 30 minutes at 10°C at a speed of 2000r / min, and place the collected sediment in a blast In a drying oven, bake at 25°C for 10 hours, take it out, crush it, and pass through...

Embodiment 2

[0027] A kind of decolorization method of apple dietary fiber, comprises the following steps:

[0028] 1) According to the ratio of material to liquid of 1g:40ml, add apple pomace into sodium hydroxide solution with a mass concentration of 2%, and mix well to obtain a mixed material liquid;

[0029] 2) At 40°C, according to the ozone generation amount of 5g / h, use a silicone tube to pass ozone gas into the mixed material liquid, and at the same time, under the condition of ultrasonic power of 250W, decolorize the mixed material liquid, and the treatment time is 25h; the unreacted ozone and the gas discharged from the reaction are extracted by a fume hood.

[0030] 3) Use hydrochloric acid with a mass concentration of 36% to adjust the pH value of the decolorized feed solution to neutral, and then centrifuge it for 25 minutes at 20°C at a speed of 4000r / min, and place the collected sediment in a blast In a drying oven, bake at 40°C for 8 hours, take it out, crush it, and pass ...

Embodiment 3

[0032] A kind of decolorization method of apple dietary fiber, comprises the following steps:

[0033] 1) According to the ratio of material to liquid of 1g:60ml, add apple pomace into sodium hydroxide with a mass concentration of 8%, and mix well to obtain a mixed material liquid;

[0034] 2) At 60°C, according to the amount of ozone generated at 30g / h, use a silicone tube to pass ozone gas into the mixed material liquid, and at the same time, decolorize the mixed material liquid under the condition of ultrasonic power of 150W. The treatment time is 20h; the unreacted ozone and the gas discharged from the reaction are extracted by a fume hood.

[0035] 3) Use hydrochloric acid with a mass concentration of 36% to adjust the pH value of the decolorized feed solution to neutral, and then centrifuge it for 15 minutes at 30°C and a speed of 6000r / min, and place the collected precipitate in the air to dry In the box, at 50°C, bake for 6 hours, take it out, crush it, and pass throu...

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PUM

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Abstract

The invention discloses a decoloring method of apple dietary fibers, belonging to the technical field of food processing. The decolorinng method comprises the following steps of: (1) adequately mixing apple pomace with an alkaline solution to obtain a mixed solution; (2) introducing ozone into the mixed solution at the temperature of 10 DEG C to 60 DEG C, and decoloring the mixed solution under an ultrasonic condition; and (3) adjusting the pH value of a decolored solution to be neutral, and then centrifuging, drying and grinding the neutral decolored solution to obtain decolored apple dietary fibers. The ultrasonic technology is introduced to the ozone decoloring technology, the ozone is uniformly dispersed into the solution by utilizing ultrasonic, the contact between the ozone and the dietary fibers is enlarged, and the decomposition of the ozone is promoted through the ultrasonic so as to generate a plurality of OH radicals, so that colorful substances in the dietary fibers are oxidized and degraded, and a good decoloring effect can be achieved. The decoloring method is free from causing the food safety problem, simple and convenient to operate, environment-friendly and suitable for being applied to the industrialized production.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a method for decolorizing apple dietary fiber. Background technique [0002] Dietary fiber has the functions of preventing constipation, helping weight loss, preventing colon and rectal cancer, preventing hemorrhoids, and lowering blood lipids. Therefore, dietary fiber is called the "seventh largest nutrient" and has attracted more and more consumers' attention. [0003] Apple pomace is rich in polyphenols, which are easily oxidized and browned in the air. If decolorization is not carried out, the prepared dietary fiber products will be dark brown, which will seriously affect the sensory properties and applications of dietary fiber. Dietary fiber is decolorized. At present, hydrogen peroxide oxidation is widely used for decolorization, but hydrogen peroxide is highly corrosive, and if there is residue in food, it will damage human health and cause food safety...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/277A23L1/308A23L5/49
Inventor 陈雪峰李蕊岑
Owner SHAANXI UNIV OF SCI & TECH