Apparatus and cultivating method for scaled cultivation of microalgae

Abstract

The invention relates to an apparatus and a cultivating method for scaled cultivation of microalgae. The apparatus comprises: an open-type track tank; a liquid outlet arranged on the open-type track tank; a liquid pump connecting to the liquid outlet, wherein a liquid inlet on the bottom of a photobioreactor is connected to the liquid outlet through the liquid pump; a liquid outlet tube on the top of the photobioreactor, wherein culture solution is delivered back to the open-type track tank through the tube. The cultivating method comprises the steps that: part of the culture solution in the open-type track tank is pumped into the bottom of the photobioreactor through the liquid pump; the culture solution is delivered from the top of the photobioreactor back to the open-type track tank, such that a circulation of culture solution is realized; the bottom of the photobioreactor is ventilated, and carbon is filled. With the apparatus and the method provided by the present invention, photosynthetic carbon fixation efficiency of open-type track tank microalgae cultivation is substantially improved, microalgae growth rate and cultivating density are substantially improved, cultivating period is reduced, and apparatus cost and operation cost of scaled microalgae cultivation are reduced.

Description

technical field [0001] The invention belongs to the field of microalgae cultivation, in particular to a device for large-scale cultivation of microalgae. [0002] The invention also relates to a method for large-scale cultivation of microalgae by using the above-mentioned device. Background technique [0003] Microalgae can effectively use light energy, CO 2 and inorganic salts to synthesize proteins, fats, carbohydrates and a variety of high value-added bioactive substances, which can be used to produce health food, food additives, feed and other chemicals through microalgae cultivation. Especially in recent years with the development of bioenergy technology, some oily microalgae can be used in saline-alkali land, desert, Marine aquaculture has the great advantage of not competing for land and people for food, and can use carbon dioxide in factory exhaust gas as a carbon source. Countries all over the world have taken it as a very important way to solve the shortage of bi...

AI Technical Summary

Problems solved by technology

So far, through open pond cultivation, although the investment and operating costs are low, the rapid growth and high photosynthetic carbon fixation capabilities of microalgae are far from being fully utilized. However, photoreactor cultivation can achieve rapid and high-density microalgae in the reactor. growth and high photosynthetic carbon fixation, but due to the structural characteristics of the photoreactor itself and the requirements for light, the reactors must be arranged at intervals, and the number of reactors per unit land area is limited, so the average area of ​​microalgae yield is also low. Very high, and reactor investment and operating costs are high

It is for these reasons based on efficiency / cost that microalgae cultivation has many disadvantages whether it is open or closed, which limits its large-scale application

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