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A kind of sulfur-free wet comprehensive processing method of konjac fine powder

A technology of comprehensive processing and konjac flour, applied in food science and other directions, can solve the problems of low safety, high sulfur residue, high difficulty, etc., and achieve the effects of reducing production costs, preventing konjac browning, and inhibiting water absorption and swelling.

Inactive Publication Date: 2020-01-17
SHAANXI UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the wet process currently used in China has the following defects: ① Most of the sulfur-containing reagents such as sodium sulfite are used to protect the color, resulting in high sulfur residues in the product and low safety, which affects the application of the product
Although there are also processing techniques using water as the medium, either the operation requirements are high and difficult, or harmful chemical reagents such as borates are used, which reduces the safety and use of the product; ③Alcohol recovery is difficult and consumes a lot of energy; ④Engineering High construction and production costs

Method used

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Experimental program
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Effect test

Embodiment

[0014] Wash and peel about 110g konjac, cut into about 1cm 3 For small particles, whip with about 310mL of 60% waste alcohol with about 1g of citric acid for 1min, centrifuge at 300r / min for 15min to obtain wet fine powder and waste liquid; then repeat the process with 150mL of 50% waste alcohol for wet fine powder Process 4 times to get the wet fine powder; dry the wet fine powder in a drying oven with a vacuum degree of 0.09MPa and a temperature of 70°C for about 80 minutes to obtain the dry fine powder. The fine powder yield is 8.6%, the fine powder is white, the viscosity is 35500mPa·s, the glucomannan content is 87%, SO 2 Not detected, pH5.2, ash content 0.86%, sand content 0.01%, water content 12%. Stir the waste liquid produced by fine powder extraction for 12 hours, centrifuge at 4000r / min for 10 minutes to obtain wet ash powder, dry the wet ash powder in a drying oven with a vacuum degree of 0.09MPa and a temperature of 70°C for about 120 minutes, namely Dry ashes. ...

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Abstract

A sulfur-free wet comprehensive processing method for konjac fine powder. The invention belongs to the technical field of agricultural and sideline products processing, and is characterized in that the clarified waste alcohol produced in the previous process is directly used for fine powder extraction after adjusting the alcohol content without evaporation and recovery, and the clarification used for the first beating to extract fine powder Edible citric acid is added to the waste alcohol, the waste liquid obtained by extracting the fine powder is stirred, placed, leached, and separated to obtain wet ash powder and clarified waste alcohol, and the clarified waste alcohol is used to extract konjac skin dregs, extract konjac alkaloids, and use vacuum Concentrate the alkaloid extract and recover the alcohol at the same time. During the concentration of the alkaloid extract, carry out alcohol precipitation to purify the alkaloid, use vacuum technology to desolventize and dry the product, and recover the alcohol at the same time. The fine powder obtained by this method has no sulfur residue, is safe and hygienic, and the quality of the fine powder is better than the requirements of national standard special grade products. The obtained by-product ashes has low alkaloid content and no fishy smell.

Description

technical field [0001] The invention belongs to the technical field of agricultural and sideline product processing, and relates to a sulfur-free wet comprehensive processing method of konjac fine powder. Background technique [0002] At present, the deep processing of konjac in China mainly focuses on konjac fine powder, that is, the extraction of glucomannan. The processing of konjac powder mainly includes dry method and wet method, among which the konjac powder processed by wet method is of good quality and is very popular among users. However, the wet process currently used in China has the following defects: ① Most of them use sulfur-containing reagents such as sodium sulfite to protect the color, resulting in high sulfur residues in the product and low safety, which affects the application of the product. Although there are a variety of sulfur-free color protection technologies, most of them use chemical reagents such as ascorbic acid (sodium), L-cysteine, phytic acid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L19/10A23L5/20
Inventor 张志健卫永华
Owner SHAANXI UNIV OF TECH
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