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

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...

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 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