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

A technology for polygeneration of shrimp and crab shells, applied in chemical instruments and methods, carboxylate preparation, carboxylate preparation, etc., can solve the problem of difficult high-value utilization of a large number of components, serious environmental pollution to avoid the use of inorganic acids and bases, the process is easy to control, and the effect of improving economic value

Inactive Publication Date: 2018-08-28
北京中科百瑞能工程技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 shell

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Organic acid decalcification: Add 100 g of fresh or dried shrimp and crab shell raw materials, add 1 M lactic acid, soak at room temperature, solid-liquid ratio (w / w) is 1:10, soak for a certain time 12 After h, solid-liquid separation is carried out to obtain decalcified shrimp and crab shells, which are washed with water to pH 6.56;

[0015] (2) Steam explosion treatment: The decalcified shrimp and crab shells washed to near neutrality are subjected to steam explosion treatment under a pressure of 0.8MPa for 15 minutes;

[0016] (3) Biological deproteinization: The shrimp and crab shell materials after steam explosion treatment are completely deproteinized into chitin with proteolytic enzymes, and the conditions for enzymatic deproteinization are: neutral protease dosage 25 U / g, solid-liquid Ratio (w / w) 1:10, enzymatic hydrolysis temperature is 45 o C, enzymatic hydrolysis time 2 h, pH 7; shrimp and crab shell raw materials were treated with organic acid decalcif...

Embodiment 2

[0018] (1) Organic acid decalcification: Add 100 g of fresh or dried shrimp and crab shell raw materials, add 1M citric acid solution, soak at room temperature, solid-liquid ratio (w / w) is 1:5, soak for a certain period of time After 24 h, solid-liquid separation was carried out to obtain decalcified shrimp and crab shells, which were washed with water to pH 5.98;

[0019] (2) Steam explosion treatment: The decalcified shrimp and crab shells washed to near neutrality were subjected to steam explosion treatment under a pressure of 1.2 MPa for 20 minutes;

[0020] (3) Biological deproteinization: the shrimp and crab shell materials after steam explosion treatment are completely deproteinized into chitin with proteolytic enzymes, and the conditions for enzymatic deproteinization are: papain dosage 40 U / g, solid-liquid ratio (w / w) 1:10, enzymatic hydrolysis temperature is 60 o C, Enzymolysis time 1 h, pH 5.5; Shrimp and crab shell raw materials were treated with organic acid deca...

Embodiment 3

[0022] (1) Organic acid decalcification: add fresh or dried raw shrimp and crab shells to 6 M gluconic acid solution and soak them at room temperature with a solid-to-liquid ratio (w / w) of 1:20 for a certain time of 6 h Finally, solid-liquid separation is carried out to obtain decalcified shrimp and crab shells, which are washed with water to a near neutral pH of 6.65;

[0023] (2) Steam explosion treatment: The decalcified shrimp and crab shells washed to near neutrality were subjected to steam explosion treatment under a pressure of 1.5 MPa for 30 minutes;

[0024] (3) Biological deproteinization: The shrimp and crab shell materials after steam explosion treatment are fermented with the strain Aspergillus niger capable of producing proteolytic enzymes, and the materials are completely deproteinized and converted into chitin. The fermentation conditions are: solid-liquid ratio (w / w ) is 1:8, the fermentation temperature is 37 o C, the fermentation time is 4 days, after the s...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C08B37/08C12P21/06C07C51/41C07C59/08C07C59/265C07C59/105
CPCC07C51/412C08B37/0003C08B37/003C12P21/06C07C59/08C07C59/265C07C59/105
Inventor 不公告发明人
Owner 北京中科百瑞能工程技术有限责任公司
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