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Method for preparing chitin

A technology of chitin and chitin, which is applied in the field of comprehensive utilization of waste water in the process of food and pharmaceutical processing, can solve the problems of large amount of waste water, pollute the environment, etc., and achieve the effect of reducing emissions and reducing production costs

Active Publication Date: 2014-07-30
济南高新区阿波罗甲壳素工程技术研究中心
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the technical defect of large amount of waste water seriously polluting the environment in the existing chitin production process, the purpose of the present invention is to provide a preparation method of chitin, which can remove calcium salt, magnesium salt and protein at one time to obtain chitin, Reduce production costs and reduce industrial sewage discharge

Method used

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  • Method for preparing chitin

Examples

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Embodiment 1

[0029] A method for preparing chitin from dried shrimp shells, the method comprises the following steps:

[0030] ① Crush 300Kg of dried shrimp shells (moisture ≤ 10%) to 5 meshes, suck it into a 3000L enamel reaction kettle (equipped with 6 ultrasonic probes, and the ultrasonic frequency is 40KHZ) with vacuum, add 2000Kg of deionized water at the same time, stir, and the speed is 50r / min.

[0031] ②Raise the temperature to 60°C, slowly add 60Kg of organic mixed acid, which consists of the following organic acids: lactic acid, formic acid, propionic acid, citric acid, malic acid, gluconic acid and a small amount of phytic acid. By weight percentage: 55% lactic acid, 8% formic acid, 12% propionic acid, 10.5% citric acid, 9.5% malic acid, 4.5% gluconic acid, 0.5% phytic acid.

[0032] ③ Adjust the rotation speed to 20r / min. After reacting for 30 minutes, cool down to 50°C and add 4.5Kg of mixed enzyme. The mixed enzyme is composed of the following enzymes: acid protease, papain...

Embodiment 2

[0039] A method for preparing chitin directly from fresh shrimp shells by wet method. In this method, the fresh shrimp shells are washed with fresh water (the amount of fresh water for washing is 0.5-2 times that of the shrimp shells), and the rinse water is passed through the grid sedimentation tank, and then passed through the grid into the Adsorption pool (sandstone, natural zeolite, activated carbon layer, chitosan resin layer), through the grid to the clear water pool (the water is reused). The washed shrimp shells are centrifuged, the shrimp shells are wet crushed or screw extruded into 3-10 meshes, the slurry is put into the reaction kettle, and deionized water is added according to 20%-50% of the slurry weight, and the following process refers to that of Example 1. method.

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Abstract

The invention relates to a new chitin production method, which belongs to the technical field of comprehensive utilization of waste water in food and medicine processing. A preparation method of chitin, the method comprising the following steps: ① crushing; ② adding an aqueous solution of organic acid to remove inorganic salts; ③ adding a mixed enzyme containing acid protease to deproteinize; ④ ultrasonic treatment; ⑤ centrifuging the reactant at high speed, The slag after centrifugation is dried to prepare chitin. The invention can remove calcium salt, magnesium salt and protein at one time to obtain chitin and high-quality calcium protein powder, which reduces production cost and discharge of industrial sewage.

Description

technical field [0001] The invention relates to a new chitin production method, which belongs to the technical field of comprehensive utilization of waste water in food and medicine processing. Background technique [0002] Chitin is a natural macromolecular substance biological polysaccharide, which widely exists in the shells of crustaceans such as shrimps and crabs, the shells of insects, and the cell walls of plants, and its amount in nature is second only to cellulose. Chitin is another element to maintain human life after protein, fat and vitamins. Therefore, it is an important raw material for medicine, food, light industry, chemical industry, environmental protection, etc. [0003] The production process of using shrimp head, shrimp shell or crab shell to produce chitin has always been used: firstly use hydrochloric acid solution to remove calcium, phosphorus and other inorganic minerals in the shell of shrimp and crab, and then rinse with water until neutral. Then...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/04C12P21/06C12P3/00
Inventor 林大昌
Owner 济南高新区阿波罗甲壳素工程技术研究中心
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