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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 difficul

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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
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Example Embodiment

[0076] Example 1

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

[0078] The eye-point nannochloropsis oculata was purchased from the Yellow Sea Fisheries Research Institute C1502, Chinese Academy of Fishery Sciences. For detailed information on the cultivation of this algae, please refer to "China Marine Medicine", 2003, 91(1), "Enriched with EPA Large-scale cultivation of marine microalgae, Pseudochlorococcus ", 5-10.

[0079] 1m after cultivation of Pseudochlorococcus 3 Algae liquid with a dry weight of 3g / L and a fatty acid content of 50% by weight, according to the present invention to extract oil, the steps are as follows:

[0080] 1. Collect the concentrated liquid of microalgae with a biomass of 186g / L through membrane concentration and disc centrifuge. It was dried with a drum dryer, and the water content was measured to be 25% by weight.

[0081] 2. Divide the algae raw material obtained in step 1 into three equally. ...

Example Embodiment

[0090] Example 2

[0091] Example 2 investigates the influence of the moisture content of the algae powder after drying on the extraction of oil from microalgae.

[0092] The eye-point nannochloropsis oculata was purchased from the Yellow Sea Fisheries Research Institute C1502, Chinese Academy of Fishery Sciences. For detailed information on the cultivation of this algae, please refer to "China Marine Medicine", 2003, 91(1), "Enriched with EPA Large-scale cultivation of marine microalgae, Pseudochlorococcus ", 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, the numbers are in sequence ①, ②, ③, ④, ⑤, ⑥ The algae solution is used to extract oil according to the following corresponding steps:

[0094] ① Collect the concentrated microalgae with a biomass of 186g / L through membrane concentration and disc centrifuge. Then, the algae solution was put into the bottom of the gre...

Example Embodiment

[0109] Example 3

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

[0111] The eye-point nannochloropsis oculata was purchased from the Yellow Sea Fisheries Research Institute C1502, Chinese Academy of Fishery Sciences. For detailed information on the cultivation of this algae, please refer to "China Marine Medicine", 2003, 91(1), "Enriched with EPA Large-scale cultivation of marine microalgae, Pseudochlorococcus ", 5-10.

[0112] 1m after cultivation of nannochloropsis oculata 3 , Dry weight is 3.3g / L, fatty acid content is 51%, of which unsaturated fatty acid / total fatty acid content is 44%. The algae liquid extracts 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 11% by weight of a mixture of starch and dextrin to the microalgae powder (weight ratio: 1:2), stir evenly, and mix the material It is fed ...

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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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