Microalgae cultivation system, cavity type photobioreactor and microalgae cultivation method

Abstract

The invention discloses a microalgae culture system, a cavity type photobioreactor and a microalgae culture method. The culture system comprises the photobioreactor capable of containing a culture solution and microalgae. The photobioreactor is in a closed type. The wall of the photobioreactor is a sealed body with a hollow sandwich structure, and / or the wall of the photobioreactor is made of a light heat insulation material. The photobioreactor is provided with a ventilation structure. The culture solution contains bicarbonate. By adopting the system for culturing the microalgae, heat exchange between the photobioreactor and a water environment where the photobioreactor is located can be well controlled, the culture temperature in the photobioreactor can be kept higher than the temperature of the water where the photobioreactor is located so as to increase the growth speed of the microalgae, but the situation that the culture temperature is too high and leads to death of the cultured microalgae will not occur. The culture method is simple, low in cost, high in culture efficiency and suitable for industrial application.

Description

technical field [0001] The invention relates to the field of microalgae biotechnology, in particular to a microalgae cultivation system, a cavity type photobioreactor and a microalgae cultivation method. Background technique [0002] In recent years, autotrophic microalgae have received more and more attention due to their functional diversity. Microalgae can be used as a new type of biodiesel feedstock. Compared with energy crops such as soybean, sugarcane, maple tree, etc., it has the advantages of short growth cycle, fast photosynthesis rate, high oil content, etc., and has a good development prospect. Microalgae efficiently fix atmospheric CO 2 , to solve environmental problems caused by the burning of fossil fuels. In addition, microalgae cells contain high-value nutrients such as protein, lipids, polysaccharides, carotenoids, and pigments. They are high-quality food and feed materials, and are also widely used organic intermediates in chemical, light and pharmaceuti...

AI Technical Summary

Problems solved by technology

In this case, the bubbling of a large number of reactors requires very complicated compressed gas piping, which greatly increases the manufacturing cost of each reactor and the construction cost of the compressed gas piping, and at the same time greatly increases the operating cost

However, erecting such a complex ventilation pipeline on the surface of a large area of ​​water is more difficult to construct, more costly to manufacture and operate, and has a high risk of being damaged by waves, so it is very difficult to achieve in large-scale production

And if you consider using an open reactor system, although the bubbling ventilation system is omitted, and it is conducive to the transfer of carbon dioxide from the air to the culture solution, so as to be absorbed by microalgae, but the temperature of the open system is different from that of the water due to evaporation. The original temperature is almost the same, and the greenhouse effect cannot be formed, so the growth of microalgae is slow and the efficiency is too low

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