Method for harvesting microalgae with magnetic separator

A magnetic separator and magnetic separation technology, applied in the field of harvesting microalgae by magnetic separator, using magnetic separator to realize rapid and efficient harvesting of microalgae, can solve the problem of high cost of microalgae harvesting, complicated operation process, small scale, etc. problem, to achieve the effect of simple structure, small size and fast speed

Inactive Publication Date: 2013-10-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of high microalgae harvesting cost, high energy consumption, complicated operation process and small scale in the prior art, the purpose of the present invention is to provide an efficient and fast method for harvesting microalgae with a magnetic separator. The separation technology has the characteristics of fast speed and high efficiency. Adding magnetic media to the microalgae culture medium to adsorb microalgae cells, and using the external magnetic field to capture the composite of the magnetic media and microalgae to separate and harvest the microalgae, realize microalgae Separation from culture medium

Method used

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  • Method for harvesting microalgae with magnetic separator

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Effect test

Embodiment 1

[0043] Embodiment 1 magnetic separator is used for the harvesting of chlorella

[0044] Add magnetic iron ferric oxide nanoparticles to the chlorella culture solution with a concentration of 0.5g / L, stir to mix the magnetic iron ferric oxide nanoparticles and the microalgae culture solution evenly, and pump the mixed solution into the magnetic separator. Stop feeding when the mixed liquid fills the magnetic separation tank, and adopt the intermittent magnetic separation method for magnetic separation. The magnetic separation time of each cycle is 10s. When the thickness reaches 30mm (such as figure 1 shown), the magnetic drum of the rotating magnetic separator, the Fe3O4 nanoparticle-microalgae complex is scraped off by the scraper (such as figure 2 shown), the recovery efficiency of Chlorella reached 95%.

Embodiment 2

[0045] Embodiment 2 magnetic separator is used for the harvesting of chlorella

[0046]Add polyethyleneimine-modified ferric oxide nanoparticles to the chlorella culture solution with a concentration of 9g / L to form a mixed solution with a material concentration of 10g / L, and stir to mix the magnetic nanoparticles and the microalgae culture solution evenly , the mixed solution is pumped into the magnetic separator, and the continuous magnetic separation method is used for magnetic separation. The flow rate of the feed liquid is 8000mL / min, and the rotation speed of the magnetic drum is 100rpm. The algae complex is scraped off by the scraper along with the rotation of the magnetic drum, and the chlorella is collected, and the recovery efficiency of the chlorella reaches 96%.

Embodiment 3

[0047] Embodiment 3 magnetic separator is used for the harvesting of chlorella

[0048] Add polyethyleneimine-modified iron ferric oxide nanoparticles to the chlorella culture solution with a concentration of 90g / L to form a mixed solution with a material concentration of 150g / L, and stir to mix the magnetic nanoparticles and the microalgae culture solution evenly , the mixed solution is pumped into the magnetic separator, and the continuous magnetic separation method is used for magnetic separation. The flow rate of the feed liquid is 100mL / min, and the rotation speed of the magnetic drum is 10rpm. The algae complex is scraped off by the scraper along with the rotation of the magnetic drum, and the chlorella is collected, and the recovery efficiency of the chlorella reaches 95%.

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Abstract

The invention relates to a method for harvesting microalgae with a magnetic separator. According to the method for harvesting the microalgae through a magnetic separation technology, as magnetic mediums are added into a microalgae culture solution for adsorbing microalgae cells, the magnetic mediums, namely microalgae compound, are rapidly and effectively captured in extremely short standing time by utilizing the magnetic separation action of a magnetic drum type magnetic separator, therefore, the microalgae cells and the culture solution are separated. The method for harvesting the microalgae is simple and convenient to operate, can be used for processing a large amount of feed liquid at the same time, the microalgae harvesting efficiency is high, the energy consumption is low, the energy is saved, and the method is easy to realize industrialization and lays a foundation for large-scale application.

Description

technical field [0001] The invention belongs to the field of microalgae harvesting, and relates to a method for harvesting microalgae with a magnetic separator, in particular to a method for realizing fast and efficient harvesting of microalgae by using a magnetic separator. Background technique [0002] Microalgae are a class of autotrophic microorganisms with broad application prospects that grow in freshwater, ocean and land. The development and application of microalgae has penetrated into many fields. In food health care, dry powder can be directly made into algae flakes for sale. At the same time, microalgae cells are rich in vitamins, amino acids and other components, which can improve the immune function of the human body; In the field, microalgae contain polyunsaturated fatty acids, which can reduce the content of cholesterol in the blood and play an important role in the prevention and treatment of cardiovascular diseases; in terms of bait and feed, microalgae are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N13/00C12N1/12C12R1/89
Inventor 郭晨胡一茹王锋刘春朝
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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