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Method for efficient extraction of oil from microalgae

A high-efficiency oil extraction technology, applied in the direction of fat oil/fat production, fat production, etc., can solve the problems of difficult separation, complicated operation, high equipment requirements, etc., and achieve the effect of simple process, improved wall breaking efficiency and high extraction efficiency

Active Publication Date: 2012-07-04
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that it solves the problem of extracting lipid from wet algae biomass, but the disadvantage is that wet algae biomass needs to be frozen, resulting in high energy consumption, less processing, and subsequent separation difficulties, which is not conducive to industrial production
The operation of this process is complicated, and oil and water need to be further separated after extraction. In addition, the extraction operation pressure is high and the equipment requirements are high.

Method used

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  • Method for efficient extraction of oil from microalgae
  • Method for efficient extraction of oil from microalgae
  • Method for efficient extraction of oil from microalgae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1 investigates the impact of process steps on oil extraction from microalgae.

[0078] Nannochloropsis oculata (nannochloropsis oculata) was purchased from C1502 of the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences. For detailed information such as the cultivation of the algal species, refer to "China Marine Medicine", 2003, 91 (1), "Enriched with EPA". Large-Scale Cultivation of the Marine Microalgae Nannochloropsis ophthalmica, 5-10.

[0079] 1m after cultivation of Nannochloropsis pseudochloropsis 3 The algae liquid has a dry weight of 3g / L and a fatty acid content of 50% by weight. Oil is extracted according to the present invention, and the steps are as follows:

[0080] 1. Collection The microalgae concentrate with a biomass of 186g / L was collected by membrane concentration and disc centrifuge concentration. Dried with a tumble dryer, the moisture content was determined to be 25% by weight.

[0081] 2. Divide the alg...

Embodiment 2

[0091] Example 2 examines the effect of the water content of the algal flour after drying on the extraction of oil from microalgae.

[0092] Nannochloropsis oculata (nannochloropsis oculata) was purchased from C1502 of the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences. For detailed information such as the cultivation of the algal species, refer to "China Marine Medicine", 2003, 91 (1), "Enriched with EPA". Large-Scale Cultivation of the Marine Microalgae Nannochloropsis ophthalmica, 5-10.

[0093] 2.4m after cultivation of Nannochloropsis oculata 3 , the dry weight is 3.2g / L, and the fatty acid content is 52% by weight. Divided into 6 groups, numbered in order ①, ②, ③, ④, ⑤, ⑥ algae liquid to extract oil according to the following corresponding steps:

[0094] ① Collection The microalgae concentrate with a biomass of 186g / L was collected by membrane concentration and disc centrifuge concentration. Then the algae liquid was put into the g...

Embodiment 3

[0110] Example 3 investigates the effect of frying temperature on oil extraction from microalgae.

[0111] Nannochloropsis oculata (nannochloropsis oculata) was purchased from C1502 of the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences. For detailed information such as the cultivation of the algal species, refer to "China Marine Medicine", 2003, 91 (1), "Enriched with EPA". Large-Scale Cultivation of the Marine Microalgae Nannochloropsis ophthalmica, 5-10.

[0112] 1m after cultivation of Nannochloropsis oculata 3 , the dry weight is 3.3g / L, the fatty acid content is 51%, and the unsaturated fatty acid / total fatty acid content is 44%. The algae liquid extracts the oil according to the following steps, and the steps are as follows:

[0113] 1. Based on the weight of the microalgae powder with a water content of 25% by weight, add a mixture of 11% by weight of starch and dextrin (weight ratio: 1:2) to the microalgae powder, stir evenly, and ...

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Abstract

The invention provides a method for efficient extraction of oil from microalgae, which comprises the following steps: (1) granulating microalgae powder to obtain algae powder pellets; (2) plain-frying the algae powder pellets obtained in Step (1); and (3) carrying out sub-critical fluid extraction on the plain-fried algae powder pellets obtained in Step (2) to obtain mixed oil and oil-free algae meal. By adopting the method, the high-efficiency, low-cost and large-scale extraction of oil from the microalgae can be realized.

Description

technical field [0001] The invention belongs to the field of oil extraction, and relates to a method for extracting oil from microalgae with high efficiency, in particular to a method for extracting oil with high efficiency, simple process, low cost and large-scale production. Background technique [0002] Microalgae has the characteristics of high photosynthetic efficiency, strong environmental adaptability, short growth cycle, high biological output, and high oil content in some species. Therefore, microalgae is a good material for preparing bioenergy, and has attracted widespread attention from all over the world. There has been an upsurge in research on microalgae as a raw material for biomass energy worldwide. [0003] At present, the microalgae with high lipid content found in the world have the characteristics of small cells (2-20 μm) and thick cell walls, which increases the difficulty of oil extraction from microalgae. Therefore, the extraction of oil from microalga...

Claims

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Application Information

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IPC IPC(8): C11B1/04C11B1/10C11B1/00
CPCC11B1/10C11B1/02C11B1/04
Inventor 杨巧利刘敏胜杜彦山
Owner ENN SCI & TECH DEV
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