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Microalgae grease extraction and separation method, equipment and application

A technology of microalgae oil and separation method, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc. It can solve the problems of complex oil phase components, easy pollution, and high energy consumption of extractants.

Inactive Publication Date: 2018-02-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of the oil phase is complex, not only containing substances such as oil and transformed fatty acids, but also biologically active substances such as vitamins, sterols, and chlorophyll.
Using traditional solvent extraction technology, the extraction purity is low, and the extraction agent is volatile and easy to cause pollution. In addition, the recovery process of the extraction agent consumes a lot of energy

Method used

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  • Microalgae grease extraction and separation method, equipment and application
  • Microalgae grease extraction and separation method, equipment and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] (1) Select Nannochloropsis algae pulp (moisture content 5%-15%) as raw material, the raw material enters the hydrothermal reaction tower from the raw material pool, the hydrothermal is kept in a subcritical state, and the filling gas is nitrogen inert gas to exclude oxygen The influence on the hydrothermal reaction; the temperature of the hydrothermal reaction tower is 270-280°C, the pressure is 6.5-7.5Mpa, and the residence time is 5min; the first liquid phase stream, the first gas phase stream and algae residue are obtained; among them, the first liquid Phase flow includes water phase and organic phase. The organic phase includes the moisture-heat decomposition substances of grease, protein, and carbohydrates and the water-insoluble organic matter generated by their mutual reactions. The water phase mainly includes subcritical water and aldehydes and amino acids dissolved in water. etc., the first gas phase stream is small molecular gases such as ammonia and carbon dio...

Embodiment 2

[0086] (1) Select low-protein and high-fat microalgae (comprising euphthalmia, yellow silk algae, and different chlorella) algae pulp (moisture content 5%-15%) as raw materials, enter the hydrothermal reaction tower, and hydrothermally Keep in a subcritical state, the filling gas is nitrogen inert gas to eliminate the influence of oxygen on the hydrothermal reaction; the temperature of the hydrothermal reaction tower is 260-270°C, the pressure is 6-6.5Mpa, and the residence time is 5min; the first liquid phase is obtained Stream, the first gas phase stream and algae residue; Wherein, the first liquid phase stream comprises water phase and organic phase, and organic phase comprises the moisture-heat decomposition substance of grease, protein, carbohydrate and the water-insoluble organic matter of the generation of its mutual reaction, The water phase mainly includes subcritical water and aldehydes and amino acids dissolved in water. The first gas phase stream is small molecular ...

Embodiment 3

[0093] (1) choose golden algae algae pulp (moisture content 5%-15%) as raw material, enter the hydrothermal reaction tower, the hydrothermal remains in the subcritical state, and the filling gas is nitrogen inert gas to get rid of the influence of oxygen on the hydrothermal reaction; The temperature of the thermal reaction tower is 230-250°C, the pressure is 5.0-6.0Mpa, and the residence time is 5min; the first liquid-phase stream, the first gas-phase stream and algae residue are obtained; wherein, the first liquid-phase stream includes an aqueous phase and an organic phase , the organic phase includes the hygrothermal decomposition substances of grease, protein, and carbohydrates and the water-insoluble organic matter generated by their mutual reactions; the water phase mainly includes subcritical water and aldehydes and amino acids dissolved in water; the first gas phase stream is ammonia , carbon dioxide and other small molecule gases, solid phase algae residues are deposite...

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Abstract

The invention provides a microalgae grease extraction and separation method which comprises the following steps: S1, performing extraction treatment on a microalgae raw material with a hydrothermal method, so as to obtain a first liquid phase flow, a first gas phase flow and microalgae dregs; S2, performing first-stage flash evaporation treatment on the first liquid phase flow and the first gas phase flow, so as to obtain high-activity substances, a second liquid phase flow and a first gas phase flow; S3, performing second-stage flash evaporation treatment on the second gas phase flow, so as to obtain a grease product and a third gas phase flow; S4, performing third-stage flash evaporation treatment on the second gas phase flow and the third gas phase flow, so as to obtain a liquid phase product and a gas phase product. According to the method provided by the invention, high-quality components and grease are prepared by controlling steam wall breaking conditions, and separation of high-activity substances, grease and algae dregs is achieved by controlling the flash evaporation temperature and pressure. By adopting the method provided by the invention, not only is separation of high-activity substances from grease achieved, but also the grease of the obtained high-activity substances is high in purity.

Description

technical field [0001] The invention relates to a method for extracting and separating oil from microalgae, in particular to a method for extracting highly active substances and oil by treating microalgae with hydrothermal method and multi-stage flash evaporation, which belongs to the extraction and utilization of microalgae nutrients and oil field. Background technique [0002] The high growth rate and high oil yield of microalgae make them the main biological raw materials for bioenergy. Moreover, algae cells also contain a large amount of polyunsaturated fatty acids, chlorophyll, and sterol nutrients that can reduce high blood pressure and heart disease, which lays the foundation for the comprehensive utilization of microalgae. [0003] However, due to the small size of microalgae cells and thick cell walls, oil extraction often requires wall-breaking treatment to achieve effective oil extraction. At present, microalgae oil extraction technology at home and abroad mainl...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B3/12
CPCC11B1/10C11B3/12
Inventor 杨晓奕刘子钰
Owner BEIHANG UNIV
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