Microbubble photobioreactor for economic microalga cultivation

Abstract

The invention relates to a microbubble photobioreactor for economic microalga cultivation. The microbubble photobioreactor is characterized by comprising a photobioreactor main body with a preset volume, a controllable particle size microbubble generation device, a flow guiding device and an LED wave frequency double-variable illumination system; the controllable particle size microbubble generation device is arranged at the bottom of the photobioreactor main body to be used for providing a carbon mass transfer and circulation power required for economic microalga cultivation and parsing dissolved oxygen at the same time; the flow guiding device is hung in the photobioreactor main body to be used for promoting liquid circulation and microbubble mass transfer; and the LED wave frequency double-variable illumination system is arranged on the outer side or in the photobioreactor main body to be used for providing an optimal wavelength and a light-dark frequency of growth of microalgae according to the specific economic microalga needs. The microbubble photobioreactor for economic microalga cultivation is simple in structure and convenient to operate and can be widely applied to economic microalga cultivation.

Description

technical field [0001] The invention belongs to the field of bioengineering, in particular to a microbubble photobioreactor for cultivating economical microalgae. Background technique [0002] Economic microalgae are rich in various biologically active substances, and have a wide range of applications in food, aquaculture, medicine, beauty, bioenergy and other industries. For example, Chlorella can be applied to the production of single-cell protein; Phaeodactylum tricornutum is used in sea cucumber breeding; and Haematococcus pluvialis is rich in astaxanthin and has strong antioxidant capacity. It is used in health products, cosmetics, The pharmaceutical industry has a vast market. Therefore, the economical microalgae biomass energy industry is a new type of industry that countries are striving to develop first. To realize the rapid development of the economical microalgae biomass industry, the first condition is to obtain high-density biomass at low cost and efficiently....

AI Technical Summary

Problems solved by technology

[0004] (a) Low utilization rate of light energy: when the cell concentration is high, the algae shading effect is prone to occur, which makes the use of light source by algae cells very limited, making it difficult to achieve high-density cultivation of economical microalgae

[0005] (b), CO 2 Insufficient supply: the carbon supply of microalgae is mainly through the introduction of a certain proportion of CO 2 Gas to achieve, and in the actual cultivation process, CO 2 supply does not meet the needs of optimal growth of microalgae

However, both of them only considered the mass transfer characteristics of microbubbles, but ignored the advantages of high-efficiency momentum conduction of microbubbles. They both adopted the method of external microbubble generators to produce microbubble water, so an additional liquid pump was needed for photobiological reactions. The main body of the device supplies microbubble water and strengthens liquid circulation

In addition, the size of the microbubbles produced by the two is uncontrollable, and there may be an oversupply or undersupply of carbon demand for different economical microalgae.

At the same time, the production of microbubble water is accompanied by large energy consumption and more complicated microbubble production process, which may cause excessive maintenance costs, energy consumption costs, and construction costs in the application of industrial expansion.

[0009] To sum up, in recent years, a lot of research has been done on the cultivation process of economic microalgae at home and abroad, but the above-mentioned technical bottlenecks have not been effectively solved, most of the research is still in the laboratory stage, and only a few companies and research institutions have established The industrialized production model has been adopted, which inevitably forms a monopoly on production technology and product prices.

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