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Extraction method for odourless DHA oil

An extraction method and oil technology, which is applied in the research field of microbial oil extraction technology, can solve the problems of heavy oil smell, large loss rate, and high energy consumption, and achieve the goal of improving extraction efficiency, short time consumption, and low energy consumption. Effect

Active Publication Date: 2015-04-15
湖北福星生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of the existing DHA oil extraction method, such as high loss rate, long time consumption, high energy consumption, and the extracted oil has a strong fishy smell, and provide a new DHA oil extraction process

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  • Extraction method for odourless DHA oil

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Effect test

Embodiment 1

[0027] The extraction method of DHA oil without fishy smell comprises the following steps:

[0028] (1) Fermentation: Fermenting Schizochytrium containing DHA to obtain a fermented liquid;

[0029] (2), dehydration of the fermented liquid: leave the fermented liquid prepared in step (1) for 2 hours to settle naturally, remove 43% of the water in the fermented liquid, and take the sedimentation concentrate;

[0030] (3), water washing: use ceramic membrane to circulate and filter the concentrate, the ceramic membrane includes a first-stage filter membrane and a second-stage filter membrane, the diameter of the first-stage filter membrane is 1um; the diameter of the second-stage filter membrane is 0.5 um; after the first-level membrane filtration removes impurities in the fermentation broth, enter the second-level membrane filtration, and then wash the concentrated solution with water. The water temperature used for washing is 30°C, the washing time is 30min, and the water consu...

Embodiment 2

[0035] The extraction method of DHA oil without fishy smell comprises the following steps:

[0036] (1) Fermentation: Fermenting Schizochytrium containing DHA to obtain a fermented liquid;

[0037] (2), dehydration of the fermented liquid: leave the fermented liquid prepared in step (1) for 1.5 hours to settle naturally, remove 40% of the water in the fermented liquid, and take the sedimentation concentrate;

[0038] (3), water washing: use the ceramic membrane to circulate and filter the concentrate, the ceramic membrane includes a first-stage filter membrane and a second-stage filter membrane, the diameter of the first-stage filter membrane is 0.8um; the diameter of the second-stage filter membrane is 0.2um; after the first-stage membrane filtration removes impurities in the fermentation broth, enter the second-stage membrane filtration, and then wash the concentrated solution with water. The water temperature used for washing is 25°C, and the washing time is 30min. 2 times...

Embodiment 3

[0043]The extraction method of DHA oil without fishy smell comprises the following steps:

[0044] (1) Fermentation: Fermenting Schizochytrium containing DHA to obtain a fermented liquid;

[0045] (2), dehydration of the fermented liquid: leave the fermented liquid prepared in step (1) for 1 hour to settle naturally, remove 35% of the water in the fermented liquid, and take the sedimentation concentrate;

[0046] (3), water washing: use the ceramic membrane to circulate and filter the concentrate, the ceramic membrane includes a first-stage filter membrane and a second-stage filter membrane, the diameter of the first-stage filter membrane is 0.5um; the diameter of the second-stage filter membrane is 0.1um; after the first-stage membrane filtration removes impurities in the fermentation broth, enter the second-stage membrane filtration, and then wash the concentrated solution with water. The water temperature used for washing is 28°C, and the washing time is 30min. 2 times.

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Abstract

The invention relates to an extraction method for odourless DHA oil. The method comprises the steps of: (1) fermentation: fermenting DHA containing Schizochytrium limacinum to obtain a fermentation broth; (2) fermentation broth dehydration: subjecting the fermentation broth to natural sedimentation, removing part of water in the fermentation broth, and taking the sedimentated concentrated liquid; (3) washing: using a ceramic membrane to conduct recirculating filtration on the concentrated liquid and performing washing; (4) cell wall breaking by a high pressure homogenizer; (5) dehydration treatment on the cell wall broken concentrated liquid; and (6) dissolution of the dehydrated concentrated liquid in an n-hexane solvent or a 95% ethanol solvent to perform extraction and desolvation so as to obtain DHA oil. The method provided by the invention greatly improves the taste and odor of DHA oil, reduces the wall breaking time, also improves the extraction efficiency and productivity of the extraction section, and is basically free of emulsification phenomenon, greatly saves the production cost, and improves production efficiency.

Description

technical field [0001] The invention belongs to the research field of extracting technology of microbial oil, and in particular relates to an extracting method of odorless DHA oil. Background technique [0002] DHA is commonly known as "brain gold", and it is called docosahexaenoic acid in Chinese. C22:6(ω-3), which belongs to the ω-3 (n-3) series of long-chain polyunsaturated fatty acids, is a very important polyunsaturated fatty acid for the human body. [0003] First of all, DHA is one of the main components of the human brain, mainly in the form of phospholipids, accounting for about 30% of the fatty acids in brain cells. During the fetal period, DHA must be obtained from the mother. During pregnancy, if the intake of DHA is insufficient, the brain cells of the fetus will grow and develop abnormally, and in severe cases, mental retardation will occur. In infants and young children, the brain is in the stage of growth and development. Studies have shown that infants w...

Claims

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Application Information

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IPC IPC(8): C11B1/02C11B1/10A23D9/02
CPCC11B1/025C11B1/04C11B1/10
Inventor 梁书俊赵书林夏德才胡锐杨齐华李寰闵征桥龚于堞
Owner 湖北福星生物科技有限公司
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