Methods for extracting high-quality shrimp oil from Antarctic krill and for preparing defatted krill protein powder

An Antarctic krill and extraction method technology, applied in the directions of edible oil/fat, tallow oil/fat production, tallow oil/fat refining, etc. Improve efficiency, reduce moisture and save consumption

Active Publication Date: 2012-06-13
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for extracting high-quality shrimp oil from Antarctic krill and a method for preparing defatted krill protein powder, and to reduce the moisture content in krill by pressing and dehydrating after krill is cooked , to solve the problem in the prior art that the water content in krill needs to be reduced by drying, resulting in a large amount of energy waste

Method used

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  • Methods for extracting high-quality shrimp oil from Antarctic krill and for preparing defatted krill protein powder
  • Methods for extracting high-quality shrimp oil from Antarctic krill and for preparing defatted krill protein powder

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Extraction method of high-quality shrimp oil from Antarctic krill:

[0030] 1. Pretreatment of raw materials of Antarctic krill: Take 660g of frozen Antarctic krill, put it in a room temperature environment of 22°C, and let it thaw naturally;

[0031] 2. Cooking the pretreated raw materials in step (1): after draining excess water, 590 g of thawed krill were obtained, which were put into a cooking pot, and heated and cooked for 5 minutes to obtain 590 g of cooked krill;

[0032] 3. Squeeze and dehydrate the cooked raw materials in step (2): put 590 g of cooked krill into a cloth bag, seal the mouth of the bag, place it in a pressing device for pressing and dehydrating, take it out after the pressing is completed, and obtain shrimp Cake 180g, shrimp cake contains 36% water, and krill squeezed liquid 410g is obtained;

[0033] 4. Crush and beat the dehydrated raw materials in step (3) to obtain a paste: put 180g of shrimp cakes into the stirring and crushing equipment...

Embodiment 2

[0043] 1. Extraction method of high-quality shrimp oil from Antarctic krill:

[0044] 1. Pretreatment of Antarctic krill raw materials: Take 1.8kg of frozen krill and place it in a room temperature environment of 20°C to allow it to thaw naturally;

[0045] 2. Cooking the pretreated raw materials in step (1): after draining excess water, 1.6 kg of thawed krill was obtained, which was put into a cooking pot, heated and cooked for 28 minutes, and 1.6 kg of cooked krill was obtained;

[0046] 3. Squeeze and dehydrate the cooked raw materials in step (2): put 1.6kg of cooked krill into a cloth bag, seal the mouth of the bag, and put it in a pressing device for pressing and dehydrating. The pressing time is 25 minutes, and the pressing is completed Finally, it was taken out to obtain 480g of shrimp cakes, the water content of shrimp cakes was 34%, and 1.1kg of krill squeezed liquid was obtained;

[0047] 4. Crush and beat the dehydrated raw materials in step (3) to obtain a paste:...

Embodiment 3

[0054] 1. Extraction method of high-quality shrimp oil from Antarctic krill:

[0055] 1. Pretreatment of Antarctic krill raw materials: Take 10.7kg of frozen krill and place it in a room temperature environment of 21°C to allow it to thaw naturally;

[0056] 2. Cooking the pretreated raw materials in step (1): after draining excess water, 9.6 kg of thawed krill were obtained, which were put into a cooking pot, heated and cooked for 55 minutes, and 9.6 kg of cooked krill were obtained;

[0057] 3. Press and dehydrate the cooked raw materials in step (2): put 9.6 kg of cooked krill into a cloth bag, seal the mouth of the bag, put it in a pressing device for pressing and dehydrating, take it out after the pressing is completed, and obtain Shrimp cake 2.9kg, shrimp cake water content 37%, obtain krill squeeze liquid 6.7kg;

[0058] 4. Crush and beat the dehydrated raw materials in step (3) to obtain a paste: put 2.9kg of shrimp cakes into the mixing and crushing equipment, start ...

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Abstract

The invention relates to methods for extracting high-quality shrimp oil from Antarctic krill and for preparing defatted krill protein powder. The methods comprise steps that: an Antarctic krill raw material is pretreated; the pretreated raw material is cooked; the cooked raw material is dehydrated by pressing; the dehydrated raw material is crushed and beaten, such that a cream is obtained; an organic solvent is added to the obtained cream, and shrimp oil lixiviation is carried out with a homogenization technology; shrimp oil is repeatedly lixiviated; obtained lixiviation liquids are combined; the mixed liquid is subject to a cold preservation treatment, and is filtered; an obtained filtrate is subject to vacuum evaporation, such that the filtrate is precipitated and dehydrated, and refined shrimp oil is obtained. According to the invention, water content in Antarctic krill is reduced by using a pressing technology which is used for replacing a heating drying technology, such that an energy-saving effect is substantial. With the beating crushing technology and the homogenization extraction technology, the lixiviation efficiency is substantially improved. Therefore, a low-temperature normal-pressure high-efficiency fresh krill wet lixiviation technology is realized, and the shrimp oil with high astaxanthin content can be obtained. The cream obtained by lixiviation by using the organic solvent is dried by heating, such that defatted krill protein powder with water content lower than 10% is obtained, and the solvent is recycled. The method provided by the invention has feasibility for industrialized implementations.

Description

Technical field: [0001] The invention belongs to the technical field of krill deep processing, and in particular relates to a method for extracting high-quality shrimp oil from fresh Antarctic krill and thawed frozen fresh krill, and also relates to a process for preparing defatted krill protein powder. Background technique: [0002] Krill belongs to the small crustaceans in the order Krillidae of the class Crustacea. At present, more than 80 kinds of krill are known, and there are 11 kinds of krill in Antarctic waters, and the most numerous, largest and most famous one is Antarctic krill. Antarctic krill is also called giant krill or Antarctic krill, with a body length of 40 to 60 mm. The body is relatively transparent, with reddish-brown spots, and it likes to live in groups. They are key species in the Antarctic ecosystem. The reserves of Antarctic krill are surprisingly rich. The estimated biological reserves of Antarctic krill are conservatively estimated at 400-600 mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/02C11B3/12A23D9/02A23J1/04
Inventor 冷凯良许洋周德庆苗钧魁孙伟红邢丽红王泽文朱敏
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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