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Airlift photobioreactor for realizing microalga flash effect

A technology of photobioreactor and flash effect, which is applied in specific-purpose bioreactor/fermenter, bioreactor/fermenter combination, enzymology/microbiology device, etc. Shuttle between the light area and the dark area, light damage to light and other problems, to achieve the effect of improving light energy utilization, high gas-liquid mass transfer intensity, and easy operation

Active Publication Date: 2015-06-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional airlift photobioreactor, the algal cells are in the light area or the dark area for a long time, and it is impossible to realize the shuttle between the light area and the dark area. It is light damage (that is, excessive light); while algal cells that are far away from the light area are in a light-limited state (that is, insufficient light) for a long time, so that the light energy utilization rate is not high

Method used

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  • Airlift photobioreactor for realizing microalga flash effect
  • Airlift photobioreactor for realizing microalga flash effect
  • Airlift photobioreactor for realizing microalga flash effect

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The air-lift photobioreactor tank is made of stainless steel, with an inner diameter of 600mm, and the height from the flange to the bottom of the tank is 1125mm; the guide tube is made of stainless steel, with an inner diameter of 400mm, and a height of 700mm, and the lower edge is from the bottom of the tank The distance between them is 125mm; four pillars of the guide tube are fixed on the inner wall of the tank bottom, and three support frames are installed on the inner wall of the tank to fix the guide tube radially; the inner light source glass casing is made of hard borosilicate glass Manufactured, the outer diameter is 40mm, the inner diameter is 33mm, and the total number is 37. It is fixed on the top cover and sealed with the top cover by the method of ZL200420009076.2 patent; the outer shell of the gas distributor is made of stainless steel, and the ventilation surface is sintered stainless steel with a diameter of 108mm. Multi-well plates with an average pore...

Embodiment 2

[0040] Others are the same as the airlift photobioreactor of embodiment 1. The internal light source used is a bar-shaped light source made of LEDs that is respectively placed in each internal light source glass casing and emits light alternately in segments. Each light-emitting section of the rod-shaped light source has a length of 50mm and is composed of 5 circles of LEDs. Each circle is arranged with 10 LED patches of dual-core 3528 type and a maximum power of 0.12W produced by Shenzhen Yuanlei Technology Co., Ltd.; The length of the light emitting section is 50mm. Each rod-shaped light source is provided with 8 light-emitting segments, and a total of 400 LEDs are arranged in 40 circles. The measured light energy emitted by each rod-shaped light source is 5.56, and the total light energy entering the culture medium is 205.72W.

[0041] The filamentous freshwater cyanobacteria Anabaena SP.PCC.7120 is cultivated in the airlift photobioreactor, and the culture solution is Na...

Embodiment 3

[0045] Others are the same as the airlift photobioreactor of embodiment 1. The internal light source used is a bar-shaped light source made of LEDs that is respectively placed in each internal light source glass casing and emits light alternately in segments. The length of each light-emitting section of the rod-shaped light source is 10mm, and it is composed of a circle of LEDs. Each circle is arranged with 10 double-core 3528-type light-emitting diode patches with a maximum power of 0.12W produced by Shenzhen Yuanlei Technology Co., Ltd.; each non- The length of the light emitting section is 30mm. Each rod-shaped light source is provided with 20 light-emitting segments, and a total of 200 LEDs are arranged in 20 circles. It is measured that the light energy emitted by each rod-shaped light source is 2.75W, and the total light energy entering the culture medium is 101.75W.

[0046] The filamentous freshwater cyanobacteria Anabaena SP.PCC.7120 is cultivated in the airlift pho...

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Abstract

The invention relates to the field of microalga culture, specifically to an airlift photobioreactor for realizing a microalga flash effect. The reactor comprises a tank body (1), a guide cylinder (2), a gas distributor (3), a top cap (5) and internal light sources, which are segment-wise luminescent rod light sources (6). Being parallel to the flow direction of a microalga culture solution, the rod light sources (6) are composed of continuously alternating luminescent segments (7) and non-luminescent segments (8), and are used for forming continuously alternating light zones and dark zones around the rod light sources. The invention has the advantages that: the flash effect of algal cells can be brought into full play, the light energy utilization of mass microalga culture can be improved, liquids can be well mixed, the strength of gas-liquid mass transfer is high, and the shear force is low.

Description

technical field [0001] The invention relates to the field of microalgae cultivation, in particular to an airlift photobioreactor for realizing the microalgae flash effect. Background technique [0002] Microalgae cells are rich in amino acids, proteins, vitamins, unsaturated fatty acids and other high value-added biological substances, and have become an important source of materials in the fields of human food, medicine, dyes, and fine chemicals. At present, with the depletion of fossil energy such as petroleum and coal, people have paid great attention to biorefinery based on biomass. As an important renewable energy source, microalgae can provide a large amount of biomass (oil, starch, cellulose) , has broad application prospects in the field of biorefinery. [0003] The core of the large-scale cultivation of microalgae is the photobioreactor. At present, there are two main methods: open cultivation and closed cultivation. Open culture is the earliest developed and most...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/00
Inventor 丛威张庆华薛升长吴霞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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