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Method for preparing citrus dietary fiber

A technology for dietary fiber and citrus is applied in the field of preparation of dietary fiber to achieve the effects of reasonable process design, reducing environmental pollution and improving quality

Pending Publication Date: 2019-08-16
广州市莱檬生物科技有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, there is still room for improvement in the existing citrus dietary fiber preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method of citrus dietary fiber, comprising the following steps:

[0045] (1) Pretreatment: 500kg of citrus peels were dissolved in 2500kg of water, and then 1kg of pectin methylesterase was added to treat pectin molecules;

[0046] (2) Cooking: transfer the solution of (1) to an autoclave, add hydrochloric acid with a mass solubility of 0.5%, adjust the pH of the system to 4, and cook at a temperature of 110°C for 2 hours;

[0047] (3) Chemical modification: add the solution of (2) into an ammonia solution with a mass solubility of 0.5%, adjust the pH of the system to 9, stir and mix evenly, and react for 4 hours under the condition of a 60°C water bath;

[0048] (4) Purification: the liquid obtained in (3) is filtered using an 800-mesh plate-and-frame filter, the filtrate is vacuum-concentrated, the sugar content of the concentrated solution is measured by a hand-held refractometer sugar meter, and the concentration is stopped when the sugar content is 5%...

Embodiment 2

[0053] The present invention differs from Example 1 in that α-amylase is also added in (1), as described below.

[0054] A preparation method of citrus dietary fiber, comprising the following steps:

[0055] (1) Pretreatment: Dissolve 500kg of citrus peel residue in 2500kg of water, then add 1kg of pectin methylesterase and 0.01kg of α-amylase to treat pectin molecules;

[0056] (2) Cooking: transfer the solution of (1) to an autoclave, add hydrochloric acid with a mass solubility of 0.5%, adjust the pH of the system to 4, and cook at a temperature of 110°C for 2 hours;

[0057] (3) Chemical modification: add the solution of (2) into an ammonia solution with a mass solubility of 0.5%, adjust the pH of the system to 9, stir and mix evenly, and react for 4 hours under the condition of a 60°C water bath;

[0058] (4) Purification: the liquid obtained in (3) is filtered using an 800-mesh plate-and-frame filter, the filtrate is vacuum-concentrated, the sugar content of the concent...

Embodiment 3

[0063] The present invention differs from Example 1 in that (2) has carried out two-step alcohol precipitation, specifically as follows.

[0064] A preparation method of citrus dietary fiber, comprising the following steps:

[0065] (1) Pretreatment: Dissolve 500kg of citrus peel residue in 2500kg of water, then add 1kg of pectin methylesterase and 0.01kg of α-amylase to treat pectin molecules;

[0066] (2) Cooking: transfer the solution of (1) to an autoclave, add hydrochloric acid with a mass solubility of 0.5%, adjust the pH of the system to 4, and cook at a temperature of 110°C for 2 hours;

[0067] (3) Chemical modification: add the solution of (2) into an ammonia solution with a mass solubility of 0.5%, adjust the pH of the system to 9, stir and mix evenly, and react for 4 hours under the condition of a 60°C water bath;

[0068] (4) Purification: the liquid obtained in (3) is filtered using an 800-mesh plate-and-frame filter, the filtrate is vacuum-concentrated, the sug...

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Abstract

The invention discloses a method for preparing citrus dietary fiber, which comprises pretreatment, cooking, chemical modification, purification, homogenization and spray drying. The process steps of the invention cooperate with each other, the impurities can be removed at an early stage, and the yield of dietary fiber is improved by high temperature and high pressure strong acid steaming, in a middle stage, impurities such as undecomposed organic matter, larger-diameter cellulose, and acid-base salt are removed by filtering and alcohol precipitation, in a later stage, chemical modification andhomogenization improve the quality of dietary fiber, the water retention is improved, and the high-yield and high-quality dietary fiber can be obtained, the process design is reasonable, and the comprehensive cost is low.

Description

technical field [0001] The invention belongs to the technical field of preparation of dietary fiber, and in particular relates to a preparation method of citrus dietary fiber. Background technique [0002] Citrus is the world's largest fruit and the third largest internationally traded agricultural product. The proportion of solid waste (husk residue, seed residue, capsule leaves) in the process of citrus juice extraction is as high as 30%-50%. Dietary fiber is a carbohydrate or its analogue that has anti-digestion properties and cannot be digested in the small intestine, including some non-digestible polysaccharides, oligosaccharides, and other plant associations. Citrus fiber is a production by-product of extracting pectin from citrus peels. The rapid development of the pectin industry will further lead to a large amount of citrus waste. The dietary fiber in citrus fruit, especially the water-soluble dietary fiber which is more beneficial to the human body, is very rich....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/22C12P19/14C12P19/04
CPCA23L33/22C12P19/14C12P19/04
Inventor 廖劲松
Owner 广州市莱檬生物科技有限公司
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