Raceway pond photobiological reactor for implementing microalgae large-scale culture

Abstract

The invention discloses a raceway pond photobiological reactor for implementing microalgae large-scale culture, which comprises a main raceway pond, an algae liquid spray unit, a stirring system and an algae liquid circulation system, wherein the stirring system comprises a motor and a stirring paddle, and the stirring paddle is arranged in the main raceway pond, so that the algae liquid can flowin the main raceway pond; the algae liquid spray unit is fixed in the main raceway pond through a metal supporting frame, and comprises a sprayer and a transparent curtain wall, the spray is used fordispersing the downflow algae liquid, and the transparent curtain wall is used for preventing the algae liquid from splashing and preventing the algae liquid from contacting the external environment;and the algae liquid circulation system is communicated with the main raceway pond and the algae liquid spray unit, and drives the algae liquid to circulate between the main raceway pond and the algae liquid spray unit. The design scheme of the novel raceway pond photobiological reactor provided by the invention can be used for implementing low-cost high-density culture of microalgae.

Description

technical field [0001] The invention relates to a photobioreactor, in particular to a raceway pond photobioreactor for realizing the large-scale cultivation of microalgae. Background technique [0002] Microalgae has important development and utilization value, and is widely used in biopharmaceuticals, nutritional products, health products, biological fertilizers, natural food processing, biological bait, sewage treatment and renewable energy production, etc. With the depletion of global fossil energy and the deterioration of the environment, microalgae, as a potential renewable energy producer, has attracted more and more attention from scientists from all over the world. [0003] At present, there are relatively few types of microalgae that have been industrialized, mainly including Spirulina, Salina, Haematococcus pluvialis, Cryptidium covii and Chlorella, etc., breaking through the low-cost and high-density culture technology of microalgae, is The key to realize its ind...

AI Technical Summary

Problems solved by technology

[0010] (1) When cultivating microalgae in the traditional runway pool photobioreactor, it is difficult for light to penetrate the liquid layer of 15-30 cm, especially as the density of algae cells increases, the penetrating ability of light becomes weaker, resulting in the loss of culture medium The algal cells in the lower layer cannot receive sufficient light, and their growth is inhibited;

[0011] (2) It is difficult to achieve effective temperature control in traditional runway pool photobioreactors. In high temperature seasons, water cooling or air cooling is used to cool the algae liquid, which consumes a lot of energy, and there are regional restrictions (low temperature sea water), which is difficult in low temperature seasons and rainy seasons. to breed;

[0012] (3) During the production process of the traditional runway pond photobioreactor, it is easy to contaminate other miscellaneous algae, bacteria, fungi, protozoa or viruses, etc., which will cause breeding failure in severe cases;

[0013] (4) When microalgae culture is carried out in the traditional runway pool photobioreactor, the utilization rate of algae cells to carbon dioxide is low. The runway pool is an open photobioreactor, and microalgae can freely absorb carbon dioxide in the air, but The concentration of carbon dioxide is low (≈0.03%), which is difficult to meet the needs of rapid growth of microalgae, and carbon dioxide has become one of the main factors limiting the growth of microalgae;

[0014] (5) The circulation of the algae liquid in the photobioreactor of the runway pool is poor, and the conversion speed of the light and dark areas of the algae cells is slow, which affects the growth of microalgae

[0015] Based on the above defects, it is difficult to effectively realize the large-scale cultivation of microalgae in the existing runway pool photobioreactor, so it is necessary to design a new runway pool photobioreactor scheme

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