Cold temperature type pressure-variable circulating technology for primary processing of polyporus

Abstract

The invention discloses a cold temperature type pressure-variable circulating technology for primary processing of polyporus. According to the cold temperature type pressure-variable circulating technology, by controlling external pressure, the critical point of the evaporating temperature for the moisture in the polyporus is enabled to be lowered, and further the purpose of drying the polyporus rapidly under the mild hypothermia condition is achieved. The technology comprises the following steps: 1) pretreatment: washing the polyporus with water, soaking the washed polyporus in weak brine, and draining; 2) freezing: freezing the polyporus in a refrigerator at 0-3 DEG C; 3) primary drying: conducting negative-pressure vacuum drying; 4) depressurizing and refrigerating; 5) temperature rising: gradually rising temperature from low pressure; 6) complete drying: completely drying the polyporus under vacuum and negative pressure conditions. The technology disclosed by the invention weakens cell respiration and free diffusion of the polyporus, and by controlling the pressure and temperature conditions, the complete drying is ensured, the nutrient substances are not lost and no consumption is achieved. Compared with the existing drying method, the technology has the advantages of good drying effect, low loss of the nutrient substances and the like.

Description

technical field [0001] The invention belongs to the technical field of primary processing of polyporus, and in particular relates to a cold-temperature variable pressure cycle process for primary processing of polyporus. Background technique [0002] Polyporus polyporus is a medicinal fungus belonging to the family Polyporaceae of the order Polyporaceae. The sclerotium is blocky or irregular in shape. The surface is brownish black or dark brown. There are many uneven tumor-like protrusions and wrinkles. It contains crude protein, Ether-soluble extracts, crude fiber, soluble sugar, etc., also contain free and bound biotin, 2-hydroxy-tetracosanoic acid and ergosterol. It is a commonly used fungal medicinal material in my country. It is flat in nature, sweet and light , the effect of diuresis and edema. The fruiting bodies of Polyporus chinensis are edible, very delicious, and have high economic value. At present, there are many reports about the processed products of Polyporus...

AI Technical Summary

Problems solved by technology

However, when drying at low temperature, it will produce the same effect as drying in the shade, and it will take a long time. Moreover, due to the influence of cell respiration of Polyporus polysaccharides, the content of Polyporus polysaccharides will decrease; if the temperature is too high, it will produce the same effect as drying in the sun. As a result, on the one hand, due to the rapid flow and evaporation of water, the nutrients in it flow rapidly with the water, which easily leads to unbalanced distribution of nutrients, resulting in nutrient accumulation and nutrient deficiency; on the other hand, due to excessive temperature, some nutrients Changes in substance structure leading to loss of medicinal function of Polyporus

[0004] In view of the deficiencies in the above-mentioned method of drying Polyporus, but there is no report on other methods of drying Polyporus, the inventor has proposed a cold-temperature variable pressure cycle process for primary processing of Polyporus through a large number of experiments.