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Process for extracting krill oil, co-produced protein and chellotosan from antarctic krill powder

A technology of Antarctic krill powder and krill oil, which is applied in the field of chitin technology and co-production of protein, can solve the problems of harsh raw material conditions of Antarctic krill, restrictions on the comprehensive development and utilization of Antarctic krill, and unfavorable large-scale industrial production. , to achieve the effect of improving the comprehensive utilization rate of raw materials and the added value of products, realizing high-value and efficient comprehensive utilization, and enriching the sources of raw materials

Active Publication Date: 2014-02-19
青岛福创环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic utilization of Antarctic krill is mainly reflected in the single extraction of krill oil or astaxanthin or chitin. A large amount of waste liquid and waste residue pollute the environment during the production process, the utilization rate of raw materials is low, and the resource consumption per unit product is large. There is a clear gap between the processing and comprehensive utilization of Antarctic krill products compared with the world's advanced level; therefore, in order to increase the added value of products and enhance the competitiveness of the international market, it is an urgent need to solve the problem of high-value and efficient comprehensive utilization of krill resources. The problem
[0003] Due to the harsh conditions required in the storage and transportation of Antarctic krill raw materials, the production cost is too high, which is not conducive to large-scale industrial production, and also greatly restricts the comprehensive development and utilization of Antarctic krill.
[0004] Antarctic krill powder is made of Antarctic krill as raw material through cooking, pressing, drying, crushing and other processes. The comprehensive utilization of Antarctic krill powder is still in its infancy, and high-quality krill oil is extracted from Antarctic krill powder , co-production of protein and chitin, and the process of realizing organic solvent, waste liquid, waste residue recycling and high-value and efficient comprehensive utilization of resources in the production process has not been reported

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0014] A process for extracting krill oil from Antarctic krill powder to co-produce protein and chitin, the steps comprising:

[0015] 1. Extraction of krill oil: take Antarctic krill powder and dry it at 50°C, soak it in petroleum ether at room temperature for 1 hour, the solid-liquid ratio is 1:6, centrifuge, and add more than 95% ethanol to the residue for leaching for 0.5 hour. The solid-liquid ratio is 1:4, the extracts are collected separately, the extracts are concentrated by rotary evaporation, and the collected organic solvents are reused for the extraction of krill oil. The concentrate is Antarctic krill oil rich in phospholipids and astaxanthin. The phospholipid content of the obtained krill oil is 38%, and the astaxanthin content is 240mg / kg;

[0016] 2. Protein extraction: Dry the defatted shrimp powder after krill oil extraction at 60°C, then add 1% NaOH solution, the solid-to-liquid ratio is 1:10, heat in a water bath at 70°C for 1 hour, filter and separate the ...

Embodiment 2

[0021] Antarctic krill powder was dried at 60°C, leached in petroleum ether at room temperature for 2 hours, the solid-to-liquid ratio was 1:15, centrifuged, and the residue was leached with more than 95% ethanol for 1 hour, with a solid-to-liquid ratio of 1:10. The extracts are collected separately, concentrated by rotary evaporation, and the collected organic solvents are reused for the extraction of krill oil. The concentrate is the Antarctic krill oil product rich in phospholipids and astaxanthin. The phospholipid content of the obtained krill oil is 45%, astaxanthin content 350mg / kg;

[0022] Dry the defatted shrimp powder after extracting krill oil at 80°C, then add 1% NaOH solution with a solid-to-liquid ratio of 1:12, and heat in a water bath at 80°C for 2 hours. Filter and separate the filtrate, wash the filter residue fully with water, combine the filtrate and washing liquid, adjust the protein isoelectric point pH=5.5 with hydrochloric acid, precipitate a large amou...

Embodiment 3

[0025] Antarctic krill powder was dried at 55°C, leached by petroleum ether at room temperature for 1.5h, the solid-to-liquid ratio was 1:10, centrifuged, and the residue continued to be leached with more than 95% ethanol for 0.8h, and the solid-to-liquid ratio was 1: 7. Collect the extracts separately, concentrate the extracts by rotary evaporation, and reuse the collected organic solvents for the extraction of krill oil. The concentrate is the Antarctic krill oil product rich in phospholipids and astaxanthin. The obtained krill oil The phospholipid content is 43%, and the astaxanthin content is 330mg / kg;

[0026] Dry the defatted shrimp powder after extracting krill oil at 80°C, then add 1% NaOH solution, the solid-to-liquid ratio is 1:11, heat it in a water bath at 75°C for 1.5h, filter and separate the filtrate, and wash the filter residue fully with water , combined the filtrate and washing solution, adjusted to the protein isoelectric point pH = 5.0 with hydrochloric aci...

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Abstract

The invention discloses a process for extracting krill krill oil, co-produced protein and chellotosan from antarctic krill powder. The process comprises the following steps: 1, krill oil is extracted, wherein the phospholipid content of the krill oil is 38-45%, and the astaxanthin content of the krill oil is 240-350 mg / kg; 2, protein is extracted, and the yield of the protein extracted through the alkali-solution and acid-isolation method is 30-36%; 3, chellotosan is prepared, alkali deproteinization and acid decalcification are performed on shrimp shells, and the deproteinization and decalcification operations are repeatedly performed for two times to prepare high purify chellotosan, and the yield of the chellotosan is 13-21%. According to the invention, three types of high purify products, namely the krill oil, the protein and the chellotosan, are extracted in sequence, so that the comprehensive utilization ratio of a raw material and the added value of products are greatly improved; the antarctic krill is replaced by the antarctic krill powder, so that the rich raw material source is realized, the severe conditions are avoided during storage and transformation of the antarctic krill, and the process is suitable for large scale industrial production; during the production process, the cyclic utilization of organic solvents, waste liquor and waste residue, and high value and efficient comprehensive utilization of sources are realized.

Description

technical field [0001] The invention relates to a process for extracting krill oil, in particular to a process for extracting krill oil from Antarctic krill powder to co-produce protein and chitin. Background technique [0002] Antarctic krill contains high-quality lipids, excellent protein, rich amino acids, natural colorants and antioxidant astaxanthin and other active ingredients; these ingredients make Antarctic krill an irreplaceable aquatic animal resource, and its use in aquatic products The application in is more and more extensive, and exerts incomparable advantages. At present, the domestic utilization of Antarctic krill is mainly reflected in the single extraction of krill oil or astaxanthin or chitin. A large amount of waste liquid and waste residue pollute the environment during the production process, the utilization rate of raw materials is low, and the resource consumption per unit product is large. There is a clear gap between the processing and comprehensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/00C07K1/14C08B37/08
Inventor 任宪君孙来娣张秋艳
Owner 青岛福创环境科技有限公司
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