Dispersion optical-fiber type photo-bioreactor with inserted spiral band

Abstract

The invention discloses a dispersion optical-fiber type photo-bioreactor with an inserted spiral band. The photo-bioreactor comprises a top cover, an outer pipe, an inner pipe and a bottom cover. The outer pipe, the top cover and the bottom cover are provided with through holes, and the outer pipe wall is provided with a liquid inlet and a liquid outlet; and the top cover is arranged at the top of the outer pipe, and the bottom cover is arranged at the bottom of the outer pipe. The dispersion optical-fiber type photo-bioreactor is characterized in that a step is arranged at the top of the inner pipe which penetrates through the through hole of the top cover to be inserted into the through hole of the outer pipe and is limited by the step arranged at the top of the inner pipe; the spiral band which is arranged between the outer pipe and the inner pipe and encircled on the inner pipe enables a spiral upward channel to be formed in a microalgae culturing area between the inner pipe and the outer pipe; a sand core funnel is arranged in the through hole of the outer pipe below the bottom of the inner pipe, the lower portion of the sand core funnel penetrates through the through hole of the bottom cover, and a seal plug is sleeved on the lower portion of the sand core funnel and fixed in the through hole of the bottom cover; and an optical fiber core is inserted in the inner pipe.

Description

technical field [0001] The invention relates to a bioreactor, in particular to a diffuse optical fiber type photobioreactor inserted with a helical bond. Background technique [0002] In today's world, the economy is developing rapidly, and the problem of climate warming caused by human emissions of greenhouse gases is becoming more and more serious. Among greenhouse gases, CO2 contributes the most to the greenhouse effect. The concentration of carbon dioxide in the atmosphere has increased from 0.028% before the industrial revolution to 0.036% now. In the 20th century, the global average surface temperature has increased by 1.0°C, and the average ocean temperature has increased by 0.6°C. This climate anomaly will have serious impact on the human living environment. Irreversible and catastrophic consequences, such as increased desertification, reduced agricultural production, frequent occurrence of severe weather and reduction of forest area. Therefore, reducing CO2 emissi...

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Problems solved by technology

However, the reduction of the pipe diameter limits the increase of the total volume. At the same time, it is extremely difficult to maintain good mixing in the slender pipe, resulting in a decrease in reactor efficiency.

[0008] A disadvantage of light transmission in ordinary reactors is that under a certain concentration of algae liquid, due to the mutual occlusion effect of microalgae, the distance of light transmission is limited. If an external light source is used, it will cause a large dark area and uneven light distribution; traditional One disadvantage of the vertical tubular photobioreactor is that the residence time of carbon dioxide in the reactor is too short, and the gas enters from the bottom of the reactor in the form of bubbles and relies on buoyancy to directly pass through the liquid phase region and exit the reactor outlet.

The stagnation time of the bubbles in the reactor is too short, so that a large amount of CO2 is not fully diffused from the gas phase region into the liquid phase region to supply the growth of microalgae cells, and is directly discharged into the atmosphere, which causes the utilization of carbon sources in the reactor. Insufficient, low carbon fixation efficiency, and the mixing of traditional vertical tubular reactors is mainly through air blowing to cause back mixing of algae liquid. This irregular random mixing will increase the occurrence of bubble aggregation and splitting. And directly exerted a large shear force on the surface of the microalgae cells, both of these factors make the microalgae cells easy to be killed and thus reduce the biomass production of the microalgae

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