Microalgae photobioreactor with nano light guide plates serving as light dispersion media

Abstract

The invention discloses a microalgae photobioreactor with nano light guide plates serving as light dispersion media. The microalgae photobioreactor comprises a photobioreactor shell, and the top of the photobioreactor shell is provided with an exhaust port. The microalgae photobioreactor is characterized in that the nano light guide plates are arranged in the shell parallelly and in hierarchical array along the length direction of the photobioreactor shell; a distance is reserved between each two adjacent nano light guide plates; LED (light emitting diode) light bars are arranged on same side wall surfaces of the nano light guide plates and controlled by a programmable LED light source controller; reflective films are arranged on the top end surface, the bottom end surface and the other side wall surface of each nano light guide plate; a main vent pipe is arranged at the bottom of the photobioreactor and communicated with an external air source; a plurality of branch vent pipes are arranged at the bottom of the photobioreactor and parallel to the nano light guide plates; each branch vent pipe is communicated with the main vent pipe and connected with a porous aeration pipe. The microalgae photobioreactor is widely applicable to fields of biology, environmental protection, energy sources and the like.

Description

technical field [0001] The invention relates to a photobioreactor, in particular to a microalgae photobioreactor using a nano light guide plate as a light dispersion medium. Background technique [0002] Microalgae is a kind of single-celled algae, because its biomass is rich in protein, oil, polysaccharide, pigment and other biochemical components, it can be widely used in the production of high value-added products such as food additives, cosmetics, nutritional health products, and pharmaceuticals , has a good application prospect. For example, microalgae biomass can be used to produce EPA, DHA and other health products, which have the functions of clearing blood lipids, lowering blood pressure, preventing coronary heart disease, and relieving pain. Microalgae protein can be used to relieve tissue edema, protect the liver, lower blood cholesterol levels, etc., and has very high medical value. [0003] In addition, due to the advantages of high photosynthetic rate, fast g...

AI Technical Summary

Problems solved by technology

However, in the actual cultivation process, as the concentration of microalgae cells increases, the mutual shielding effect between microalgae cells becomes more and more significant, making the incident light intensity decay exponentially along its propagation direction, that is, the phenomenon of light attenuation, which leads to the reactor The distribution of internal light intensity is uneven, and there is an obvious gradient of light intensity

Specifically, the area near the light source produces photoinhibition because the light intensity is higher than the light saturation point of the algae cells, which damages the photosystem II in the photosynthesis of the microalgae cells, which is not conducive to the growth of the microalgae cells

However, the growth of microalgal cells in the area far away from the light source is limited due to insufficient light, which ultimately limits the performance of the reactor.

[0006] Limited by the extremely uneven light distribution in the microalgae photobioreactor, most of the microalgae cells in the reactor do not receive sufficient light, resulting in low microalgae yields. The light path (for the raceway pool reactor in the open culture, refers to its depth; for the plate reactor in the closed culture, refers to its thickness) will not be too large, therefore, in order to increase the total number of microalgae Yield requires a large number of narrow-path microalgae photobioreactors for the cultivation of microalgae, and a large number of narrow-pathway microalgae photobioreactors will increase production and maintenance costs on the one hand, and a large number of narrow-pathway microalgae photobioreactors will The bioreactor has a large light incident area, and more light sources need to be invested to maintain the growth of microalgae cells, which will undoubtedly increase the cost of light source investment, operation and maintenance for microalgae cultivation

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