Production method of white lower-fat salt-free edible silkworm protein powder

Abstract

The invention discloses a production method of a white low-fat odorless and salt-free edible silkworm pupa protein powder. The method comprises the following procedures: fresh wet or dry silkworm pupa, tussah pupa or caster silkworm pupa is excorticated after being broken and separated and degreased after being dissolved in alkali solution; then the acid sinking is configurated and membranal filtrated to desalted and dewatered, and is alkali dissolved again and then the hydrogen peroxide or the ozone is added to decolorize and deodorize; then the membrane filtration is adopted for dewatering; then the ethanol is used for immersing and cleaning, degreasing, dewatering, decolorizing and deodorizing the protein; the protein is then superfinely comminuted after being vacuum dried, deodorized and dewatered, thus the white low-fat and salt-free edible silkworm pupa protein powder without the pupa smell is obtained. In the method, the effects of decolorizing, deodorizing and desalting are good and the products have a high quality; the amino acid composition is of equilibrium; the protein content reaches more than 90 percent, the content of the fat is lower than 2 percent and the ash content is less than 3 percent; the products have a good safety without organic residues, thus can be applied to the industries of medicine and food. At the same time, by adopting the method, the comprehensive cost is low, the auxiliary materials for production can be reused without pollution caused by the discharged acid waste water; the chosen equipment is all suitable for continuous mass production.

Description

Technical field [0001] The invention belongs to the technical field of the production process of silkworm pupa protein. technical background [0002] my country is a large sericulture country with an annual output of 650,000 tons of silkworm cocoons, accounting for 70% of the world's total cocoons, of which the output of fresh silkworm pupae can reach 500,000 tons. Silkworm pupae have extremely high nutritional value and are rich in protein (fresh silkworm pupae contain 51% crude protein), fatty acids (29% crude fat), vitamins (including vitamin A, vitamin B2, vitamin D, ergosterol, etc.). The protein content of silkworm pupa is more than 50%, which is much higher than that of general food. Moreover, the protein has a complete range of essential amino acids. The protein of silkworm pupa is composed of 18 kinds of amino acids, of which the content of 8 kinds of amino acids necessary for human body is very high. The content of these 8 essential amino acids in silkworm pupa is appro...

AI Technical Summary

Problems solved by technology

[0003] Fresh silkworm chrysalis has high fat content and has an unpleasant stench. Therefore, in order to produce high-quality silkworm chrysalis protein that meets food-grade standards, it is necessary to solve the problems of decolorization, deodorization, degreasing, and desalination in the production process. For a long time, extensive research The researchers and producers have carried out useful explorations, but there are the following problems in the production process that has been announced at present: 1. The product quality is poor

If defatted silkworm chrysalis is used as raw material to produce food-grade silkworm chrysalis protein powder, the problem of degreasing is solved, but before degreasing, silkworm chrysalis are rarely treated with impurities, or some have deteriorated due to long storage time, and impurities in defatted silkworm chrysalis There are many dead silkworms and dead pupae, and there are many spoiled pupae. Therefore, the silkworm pupae protein powder produced by using it as raw material is of poor quality

2. Production is limited

There is an invention that uses the method of supercritical extraction to produce silkworm chrysalis protein powder. This method has large investment and small production capacity, and cannot be industrialized.

3. The sensory indicators of the product are poor

If some only use hydrogen peroxide or ozone for decolorization and deodorization, and some only use organic solvents for degreasing and deodorizing, because there is no comprehensive degreasing, deodorizing and decolorizing method, the effect is not ideal