A method for extracting dietary fibers from sweet potato residues

A technology of dietary fiber and extraction method, which is applied in the field of extraction of dietary fiber from sweet potato dregs, can solve the problems of difficult control, decreased water holding capacity and expansion force, and high cost, and achieves reduced lignin content, small water holding capacity and expansion force, and easy The effect of decomposition

Active Publication Date: 2015-09-16
YANTAI NEW ERA HEALTH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, chemical methods are the main method for extracting dietary fiber at home and abroad. This process is simple and the input cost is low, but it has obvious effects on the physical and chemical properties and physiological functions of dietary fiber products during processing, such as hot alkali soaking and repeated water rinsing. The yield of dietary fiber is reduced, and the water holding capacity and expansion force of the product are significantly reduced; at the same time...

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  • A method for extracting dietary fibers from sweet potato residues

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Effect test

Embodiment 1

[0042] A kind of extraction method of sweet potato dregs dietary fiber comprises the following steps:

[0043] (1) Alkaline cooking: Stir and mix the fresh sweet potato slag without impurities and sludge with the calcium bicarbonate whose addition amount is 2% of the fresh sweet potato slag quality, and add 0.1 times the pure water of the fresh sweet potato slag quality, carry out high pressure Cook for 0.5h, and the pressure of high-pressure cooking is 0.2MPa;

[0044] (2) steam explosion: the mixed material after step (1) high-pressure cooking is added acetic acid solution, the mass fraction of described acetic acid solution is 4%, and the addition of acetic acid is 4% of fresh sweet potato dregs quality, seals and stirs and mixes evenly, Then carry out steam explosion, explosion conditions: control the reaction temperature to 120°C, hold the pressure at 0.3MPa for 20 minutes and then explode;

[0045] (3) Preparation of inoculum slurry: add the mixed material after steam e...

Embodiment 2

[0052] A kind of extraction method of sweet potato dregs dietary fiber comprises the following steps:

[0053] (1) Alkaline cooking: stir and mix the fresh sweet potato dregs without impurities and sludge with the ammonium bicarbonate whose addition amount is 3% of the fresh sweet potato dregs quality, and add 0.1 times the pure water of the fresh sweet potato dregs quality, and carry out high pressure Cook for 1 hour, and the pressure of high-pressure cooking is 0.4MPa;

[0054] (2) Steam explosion: add citric acid solution to the mixed material after step (1) autoclaving, the mass fraction of the citric acid solution is 6%, the addition of citric acid is 5% of the fresh sweet potato residue quality, seal and stir Mix evenly, and then carry out steam explosion. Explosion conditions: control the reaction temperature to 130°C, hold the pressure at 0.5MPa for 15 minutes, and then explode;

[0055] (3) Preparation of inoculation slurry: add the mixed material after steam explosi...

Embodiment 3

[0062] A kind of extraction method of sweet potato dregs dietary fiber comprises the following steps:

[0063] (1) Alkaline cooking: stir and mix the fresh sweet potato slag without impurities and sludge with the potassium bicarbonate whose addition amount is 4% of the fresh sweet potato slag quality, and add 0.1 times the pure water of the fresh sweet potato slag quality, carry out high pressure Cook for 1 hour, and the pressure of high-pressure cooking is 0.5MPa;

[0064] (2) steam explosion: the mixed material after step (1) high-pressure cooking is added formic acid solution, the mass fraction of described formic acid solution is 8%, and the addition of formic acid is 6% of fresh sweet potato dregs quality, seals and stirs and mixes evenly, Then carry out steam explosion, blasting conditions: control the reaction temperature to 125°C, hold the pressure at 0.4MPa for 15 minutes and then explode;

[0065] (3) Preparation of inoculum slurry: add the mixed material after stea...

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Abstract

The present invention discloses a method for extracting dietary fibers from sweet potato residues, and belongs to the field of dietary fiber processing. The method comprises the following steps: alkaline cooking, steam explosion, inoculation pulp preparation, ferment preparation, raw material substrate fermentation, insoluble dietary fiber extraction and soluble dietary fiber extraction. The sweet potato residues are used as raw materials to extract the dietary fibers, turning waste into treasure; using both alkaline cooking and steam explosion pretreatments and low-intensity intermittent ultrasonic assisted microbial fermentation and culture can shorten the production cycle; and the extraction rate and purity of the obtained dietary fibers are > 95.6% and 92%, respectively, making the ratio of the soluble dietary fibers of the dietary fibers extracted from the sweet potato residues up to > 19.8%, so that the dietary fibers extracted from the sweet potato residues have a higher water holding capacity and expansibility and a higher physiological activity.

Description

technical field [0001] The invention belongs to the field of dietary fiber processing and relates to a method for extracting dietary fiber from sweet potato dregs. Background technique [0002] Sweet potato is an important crop with high and stable yield, rich nutrition and wide application. It is mainly used to extract starch, make vermicelli, vermicelli and develop sweet potato beverage. -14%, sweet potato dregs contain a lot of nutrients, including 40-50% starch and 20-30% dietary fiber. At present, many enterprises discharge it with wastewater or use it as feed. According to statistics, about 50 million tons of sweet potato residue are discarded as waste every year. The water content of fresh potato dregs is as high as 80%, and there are more than 30 kinds of bacteria in it. It is not easy to store and transport. After spoilage, it will produce stench and cause serious environmental pollution. If it is dried, the cost will be too high, which will increase the burden on ...

Claims

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Application Information

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IPC IPC(8): A23L1/308A23L1/214A23L1/28A23L19/10
Inventor 王芬
Owner YANTAI NEW ERA HEALTH IND
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