Deodorization method for improving quality of microalgae oil rich in DHA (docosahexaenoic acid)

A microalgae oil and deodorization technology, which is applied in the direction of fat oil/fat refining and fat production, can solve the problems of rancidity, affecting the quality of oil, adverse effects on quality and stability, etc., to reduce the formation of secondary lipid oxidation products, Effects of lowering oxygen levels

Pending Publication Date: 2022-06-24
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the quality and stability of DHA-enriched oils can also be adversely affected if the oils are exposed to oxygen during deodorizat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Deodorization of DHA-enriched microalgal oil with steam generators, cooling tanks and vacuum pumps. Vacuum is provided by a Roots vacuum pump connected to the deodorizer. About 60kg of decolorized oil after decolorization is sent to the deodorant. The vacuum is kept at 100kpa. Heat the test chamber to 180°C using heat transfer oil and keep it at this temperature for 4 hours. During the whole deodorization process, the total consumption of stripping steam is adjusted to about 9L,

specific Embodiment approach 2

[0023] After deodorization, the oil is pushed into the cooling tank with pure nitrogen, and cooled by cold water circulation under nitrogen protection: deionized water at room temperature is injected into the steam generator, and the water is heated to form steam for deodorization.

specific Embodiment approach 4

[0025] Each deodorization method was repeated three times.

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PUM

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Abstract

The invention relates to the field of oil extraction, and discloses a deodorization method for improving the quality of microalgae oil rich in DHA (docosahexaenoic acid). The deodorization method comprises the following steps: firstly, fermenting DHA through schizophyllum commune, then carrying out cell lysis and centrifugation to obtain DHA-rich oil, and carrying out pre-refining to obtain decolored oil. And carrying out deodorization treatment on the decolorized oil, heating ionized water used for deodorization until the ionized water is boiled, discharging gas and steam separated from the water, and then pumping the gas and the steam into a steam generator. And the pre-deoxygenated water is further heated to form steam. And then deodorization is carried out. According to the method, the peroxide value and p-anisidine value of the grease are effectively reduced by reducing the negative influence of oxygen, and finally a high-quality product meeting market requirements is obtained.

Description

technical field [0001] The invention relates to the technical field of microalgal oil processing, and mainly relates to a deodorization method for improving the quality of DHA-rich microalgal oil. Background technique [0002] Docosahexaenoic acid (DHA, 22:6n-3) is an important long-chain polyunsaturated fatty acid (PUFA) that plays an important role in human health. Traditionally, marine fish have been the main source of DHA, but due to the increasing scarcity of marine resources, DHA-rich microalgal oils have received extensive attention. [0003] One of the main problems with the use of DHA-enriched oils on the market is their strong unpleasant taste. DHA-rich microalgal oil contains nearly 70% polyunsaturated fatty acids, and oils with a high proportion of polyunsaturated fatty acids are easily oxidized during processing and storage to form hydroperoxides (primary oxidation products) and odor components such as Aldehydes and ketones (secondary oxidation products). [...

Claims

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Application Information

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IPC IPC(8): C11B3/14C11B3/00
CPCC11B3/14
Inventor 于殿宇董天玉杨欣润钟文雅李勋刘天一江连州王立琦
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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