Sulfur-free or low-sulfur wet processing method of konjac finemeal

A konjac powder and processing method technology, applied in the application, food preparation, food science and other directions, can solve the problems of low safety, high difficulty, high energy consumption, etc., achieve low net alcohol consumption, inhibit water absorption and swelling, biological The effect of low alkali content

Inactive Publication Date: 2013-10-16
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1 Sulfur-free konjac powder wet processing

[0012] Wash and peel about 110g konjac, cut into about 1cm 3 For small particles, use about 310ml of 50° waste alcohol with about 1g of citric acid to whip for about 1min, let it stand for about 10min, and remove the upper liquid; then add about 150ml of 50° waste alcohol to the solid residue, whip for about 1min, and let For about 10 minutes, remove the upper layer of liquid; then add about 150ml of 50° waste alcohol to the solid slag and whip for about 1 minute, let it stand for about 5 minutes, remove the upper layer of liquid, and repeat this process twice; then add about 150ml of 70° new alcohol to the solid slag Stir for about 10 minutes, let it stand for about 5 minutes, and remove the upper liquid to obtain wet fine powder; dry the wet fine powder in a drying oven at about 70°C for about 40 minutes to obtain dry fine powder. The fine powder yield is 8.6%. After deducting the recovered alcohol, the net cons...

Embodiment 2

[0013] Embodiment 2 low-sulfur konjac powder wet processing

[0014] Wash and peel about 110g konjac, cut into about 1cm 3 310ml of 50° waste alcohol added with about 0.2g of citric acid and 0.02g of sodium sulfite was whipped for about 1min, left to stand for about 10min, and the upper liquid was removed; then about 150ml of 50° waste alcohol was added to the solid slag and whipped About 1min, let stand for about 10min, remove the upper liquid; then add about 150ml 50° waste alcohol to the solid slag, whip for about 1min, let stand for about 5min, remove the upper liquid, repeat this process twice; then add to the solid slag Stir about 150ml of 70° new alcohol for about 10 minutes, let it stand for about 5 minutes, and remove the upper liquid to obtain wet powder; dry the wet powder in a drying oven at about 70°C for about 40 minutes to obtain dry powder. The fine powder yield is 8.5%. After deducting the recovered alcohol, the net consumption of 95° new alcohol is 45ml. The...

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Abstract

The invention discloses a sulfur-free or low-sulfur wet processing method of konjac finemeal. The sulfur-free or low-sulfur wet processing method of the konjac finemeal comprises the following steps: finely cleaning and peeling fresh konjac, crushing, whipping by using low-concentration alcohol which is added with citric acid or citric acid and sodium sulfite, performing liquid-solid separation, repeating for several times, rinsing and dewatering by using new alcohol with a relatively high concentration, performing liquid-solid separation to obtain wet finemeal, decompressing and desolventizing the wet finemeal, drying to obtain dry finemeal, and grinding the dry powder as required into commercial finemeal or micropowder, wherein clear alcohol obtained by centrifuging the generated waste alcohol can be used in next production, and the obtained solid residue can be dried to obtain side product konjac ash power. The sulfur-free or low-sulfur wet processing method of the konjac finemeal has the characteristics as follows: no sulfur-containing chemical reagent or only a small amount of sulfur-containing chemical reagent is used; the color-protecting cost is reduced; the alcohol consumption is low; the quality of the finemeal is high; the side product konjac ash power is low in alkaloid content and free from stench and can be used as animal feed or even a food raw material; the sulfur-free or low-sulfur wet processing method is free from environment pollution and relatively low in relative processing cost; therefore, the sulfur-free or low-sulfur wet processing method is suitable for being popularized and applied.

Description

technical field [0001] The invention belongs to the technical field of agricultural and sideline products processing, and relates to a sulfur-free or low-sulfur wet 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 aci...

Claims

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Application Information

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IPC IPC(8): A23L1/214A23L19/10
Inventor 张志健卫永华梁引库党娅韩豪李新生
Owner SHAANXI UNIV OF TECH
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