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Novel industrial production method for extracting DHA (docosahexaenoic acid) from schizochytrium limacinum powder

A technology for industrial production of Schizochytrium powder, applied in animal husbandry, fat production, food processing, etc., can solve problems such as high extraction cost and low DHA yield

Pending Publication Date: 2022-03-11
青岛赛特生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention not only overcomes the low yield of DHA in the liquid-liquid-oil-water separation industry, but also overcomes the shortcomings of the high extraction cost of the supercritical fluid carbon dioxide direct extraction method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 2

[0033] Mix the Schizochytrium powder prepared by spray drying with the marigold residue at a ratio of 1:1, and pass through an 80-mesh vibrating sieve. The undersize is conveyed to the extruding granulator continuously by the screw, and made into columnar granules with a diameter of 5mm and a length of 12mm, and the water content of the granules is controlled to be less than 12% by mixing materials.

[0034] 20 tons of mixed particles of Schizochytrium sp. were continuously fed into a horizontal rotary extractor with a daily processing capacity of 30 tons, and the screw feeding rate was 0.83 tons / hour.

[0035] Spray the leach solution of extraction agent No. 6 solvent oil according to the gradient concentration in the reverse direction of the rotation of the horizontal extractor, and control the ratio of solid to liquid to 1:1.5.

[0036] Control the extraction temperature of the horizontal extractor to 50±3°C and the rotation speed to 0.7r / h.

[0037] The extracted product ...

specific Embodiment approach 3

[0045] Mix the Schizochytrium powder prepared by spray drying with the marigold residue at a ratio of 1:1, and pass through an 80-mesh vibrating sieve. The undersize is conveyed to the extruding granulator continuously by the screw, and made into columnar granules with a diameter of 5mm and a length of 12mm, and the water content of the granules is controlled to be less than 12% by mixing materials.

[0046] 24 tons of mixed particles of Schizochytrium sp. were continuously fed into a horizontal rotary extractor with a daily processing capacity of 30 tons, and the screw feeding rate was 1.0 tons / hour.

[0047] Spray the leachate of extraction agent No. 6 solvent oil according to the gradient concentration in the reverse direction of the rotation of the horizontal extractor, and control the ratio of solid to liquid to 1:1.6.

[0048] Control the extraction temperature of the horizontal extractor to 52±3°C and the rotation speed to 0.75r / h.

[0049] The extracted product liquid...

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Abstract

The invention relates to the technical field of docosahexaenoic acid (DHA) preparation, in particular to a novel industrial production method for extracting high-quality DHA from schizochytrium limacinum powder. The preparation method comprises the following steps: by taking artificially fermented schizochytrium limacinum as an initial raw material, mixing dried schizochytrium limacinum powder with residues obtained after extracting xanthophyll resin from marigold according to a certain proportion, and extruding and granulating. Adding the particles into a rotocel extractor, and performing low-temperature countercurrent continuous extraction and concentration by adopting a food processing aid No. 6 solvent to obtain DHA crude oil; and carrying out supercritical fluid carbon dioxide extraction and refining on the DHA crude oil to obtain DHA essential oil with the content of more than 40%. According to the method, mixed granulation and low-temperature countercurrent continuous extraction processes are adopted, so that the method has the advantages of high treatment capacity, high extraction rate, low energy consumption, less solvent loss, low extraction cost and the like, and industrial large-scale production is facilitated; and a supercritical fluid carbon dioxide refining process is adopted, so that the defect of solvent residue in solvent method extraction is overcome, the product quality is greatly improved, and the application prospect of the product is very wide.

Description

technical field [0001] The raw material involved in the present invention is artificially fermented Schizochytrium algae as the initial raw material, using physical means, through the process of mixing granulation, solvent method low-temperature countercurrent continuous extraction, centrifugal thin film evaporation, supercritical fluid carbon dioxide refining and other processes, to achieve high The industrialized production of DHA essential oil with low content and high quality belongs to the category of deep processing of agricultural by-products, biotechnology and food processing. Background technique [0002] Schizochytrium (Schizochytrium), also known as Schizochytrium, belongs to the Phylum Fungi, Class Myxomycetes, and Order Thraustochytrium. The algae can be produced through heterotrophic propagation, not affected by seasons, and can be produced professionally on a large scale. Due to the controllable breeding conditions, no toxic pollution, stable composition and ...

Claims

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Application Information

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IPC IPC(8): C11B9/02A23K10/16A23K10/37
CPCC11B9/025C11B9/027A23K10/16A23K10/37Y02P60/87
Inventor 张慧崔永刚刘建华
Owner 青岛赛特生物科技有限公司