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Extraction method of krill oil

An extraction method and krill oil technology, applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the problems of other nutritional components destruction, solvent residue, affecting the utilization of krill protein, etc., and achieve high nutritional value , No organic solvent residue, high extraction rate

Active Publication Date: 2021-02-26
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The extraction methods of krill oil at home and abroad mainly include: organic solvent method, enzymatic hydrolysis assisted extraction method, supercritical fluid extraction and other methods. Compared with other methods, the organic solvent method has the advantages of simple process, high extraction efficiency and low cost. It is still the most commonly used method in industrialization, but the method of extracting shrimp oil with whole shrimp as raw material and using organic solvents has the following problems: organic solvent extraction will inevitably have solvent residues, which affects the utilization of krill protein and causes damage to other nutrients. Destruction, affecting the full utilization of krill resources

Method used

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  • Extraction method of krill oil

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Effect test

Embodiment 1

[0049] A method for extracting krill oil, comprising the following steps:

[0050] Step 1. Dry the body surface moisture within 3 hours after Antarctic krill is caught, and collect the blown liquid I; wherein, the step 1 also includes the following steps: a. Evenly laying Antarctic krill on the A multi-layer drying net distributed from top to bottom, and the multi-layer drying net is arranged in a relatively airtight drying device; b. From the bottom of the drying device, dry nitrogen gas is passed into it, and the temperature of the nitrogen gas is 50°C; c. Nitrogen is discharged from the outlet of the drying device after passing through the multi-layer drying net; d. The discharged nitrogen with water vapor is separated by water vapor to obtain liquid I;

[0051] Step 2. Freeze the Antarctic krill after drying the body surface, and then use microwave thawing treatment, and repeat the freezing and microwave thawing treatment twice; the internal temperature of the frozen Antarct...

Embodiment 2

[0063] A method for extracting krill oil, comprising the following steps:

[0064] Step 1. Dry the body surface moisture within 2.5 hours after the Antarctic krill is caught, and collect the blown liquid I; wherein, the step 1 also includes the following steps: a. Spread the Antarctic krill evenly on the A multi-layer drying net distributed from top to bottom, and the multi-layer drying net is arranged in a relatively airtight drying device; b, from the bottom of the drying device, dry nitrogen gas is passed into it, and the temperature of the nitrogen gas is 55 ° C; c. Nitrogen is discharged from the outlet of the drying device after passing through the multi-layer drying net; d. The discharged nitrogen with water vapor is separated by water vapor to obtain liquid I;

[0065] Step 2. Freeze the Antarctic krill after drying the body surface, and then use microwave thawing treatment, and repeat the freezing and microwave thawing treatment 3 times; the internal temperature of th...

Embodiment 3

[0077] A method for extracting krill oil, comprising the following steps:

[0078] Step 1. Dry the body surface moisture of Antarctic krill within 2 hours after fishing, and collect the blown liquid I; wherein, the step 1 also includes the following steps: a. Spread the Antarctic krill evenly on the A multi-layer drying net distributed from top to bottom, and the multi-layer drying net is arranged in a relatively airtight drying device; b. From the bottom of the drying device, dry nitrogen gas is passed into it, and the temperature of the nitrogen gas is 60°C; c. Nitrogen is discharged from the outlet of the drying device after passing through the multi-layer drying net; d. The discharged nitrogen with water vapor is separated by water vapor to obtain liquid I;

[0079] Step 2. Freeze the Antarctic krill after drying the body surface, and then use microwave thawing treatment, and repeat the freezing and microwave thawing treatment 3 times; the internal temperature of the froze...

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Abstract

The invention discloses a method for extracting krill oil, which comprises the following steps: drying the body surface moisture of Antarctic krill, repeating freezing-microwave thawing treatment, and collecting liquid II; making Antarctic krill into quick-frozen Antarctic krill powder After mixing evenly with liquid I, it is ultrasonically crushed to obtain mixture II; the mixture II is centrifuged to obtain residue I and liquid III; the residue I is flashed by instantaneous pressure difference to obtain liquid IV and residue II; the residue II is squeezed to obtain primary krill Oil and residue III; residue III, liquid II and liquid III were mixed to obtain mixture III, enzymolyzed and centrifuged to obtain enzymolysis solution, and then organic solvent extraction was obtained to obtain secondary krill oil; secondary krill oil, liquid IV and primary The krill oil is mixed and centrifuged to remove impurities and water, and the krill oil is refined. The krill oil obtained by the method of the invention has a high extraction rate, can effectively retain the active ingredients in the krill oil, and the finally obtained product has high nutritional value and no organic solvent residue.

Description

technical field [0001] The invention relates to the technical field of bioactive substances and functional food production formulas, in particular to a method for extracting krill oil. Background technique [0002] Antarctic krill is rich in resources, and the growth environment is free from industrial pollution. Krill oil is a lipid extracted from Antarctic krill (Euphausia superba), and its main components include: glycerides, phospholipids, astaxanthin, sterols, etc. At the same time, krill oil contains natural antioxidant astaxanthin, the content can reach 100mg / kg-300mg / kg, its antioxidant capacity is much higher than that of vitamin E, lycopene and other substances, and it is known as the strongest antioxidant activity of natural substances. Existing studies have proved that krill oil is rich in various unsaturated fatty acids, among which the content of long-chain omega-3 polyunsaturated fatty acids EPA and DHA is as high as 15.86%. Unlike fish oil and cod liver oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/00C11B1/02C11B1/16C11B1/06C11B3/00
CPCC11B1/00C11B1/02C11B1/025C11B1/06C11B1/16C11B3/001C11B3/006
Inventor 刘慧燕张少敏贾洪信张志平潘兆广
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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