Method for steam explosion cleaning refining polygeneration by using shrimp and crab shells

Abstract

In the prior art, during the extraction of chitin in processing of shrimp and crab shells, the use of a large amount of acids and alkalis for removing calcium and proteins can cause serious environmental pollution and the difficult high-value utilization of a large amount of calcium and proteins. A purpose of the present invention is to solve the problems in the prior art. The invention provides amethod for steam explosion cleaning refining polygeneration by using shrimp and crab shells. According to the method, after shrimp and crab shells are subjected to calcium extraction with an organicacid, and treatment is performed with a steam explosion method without the adding of inorganic acids and alkalis, such that the dense structure is destroyed so as to improve the possibility of the subsequent reaction; and the material being subjected to the steam explosion treatment is subjected to solid-state fermentation with proteinase or proteinase-producing microorganisms to further hydrolyzeproteins, such that the shrimp and crab shells are completely separated to obtain organic acids, calcium, proteins and chitin. According to the present invention, the shrimp and crab shells are subjected to steam explosion treatment, such that the influence of the dense structure on the biotransformation is released, the consumption of enzyme or bacteria is reduced, and the reaction time is shortened; the polygeneration of chitin, organic calcium and proteins in the shrimp and crab shells is achieved so as to improve the economic utilization value; and the treatment process avoids the use ofa large number of inorganic acids and alkalis, the process is clean and pollution-free, the process is easy to control, the product is stable, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of waste in aquatic product processing, and in particular relates to a steam explosion clean refining method for shrimp and crab shells. Background technique [0002] The scientific name of shrimp and crab shells is polyacetyl glucosamine, which is a kind of natural polymer organic matter, and it is also a solid waste produced by the aquatic industry. With the development of artificial farming of shrimp and crabs and aquatic product processing in our country, the amount of these solid wastes is increasing. It is estimated that 0.5-0.6 tons of leftovers such as shrimp shells are produced for every ton of shrimp produced. At present, my country's aquatic shrimp and crab products produce more than 5 million tons of crustacean biomass waste such as shrimp and crab shells. Since shrimp and crab shells are rich in protein (10-25%), in the case of high moisture content, it will cause environment...

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the problem that a large amount of acid and alkali is used to remove calcium salt and protein in the current process of processing and utilizing chitin in shrimp and crab shells, which causes serious environmental pollution and the difficulty of high-value utilization of a large number of components in shrimp and crab shells. After acid decalcification, combine steam explosion and biological method to deproteinize, cleanly prepare chitin from shrimp and crab shells and co-produce organic calcium and protein, avoid environmental pollution caused by the use of a large amount of inorganic acids and bases, and realize shrimp and crab shells High-value comprehensive utilization of waste