Device and method for large-scale culture of microalgae

Abstract

The invention relates to a device for large-scale culture of microalgae. The device includes at least one culture unit, and each culture unit comprises: a light zone layer; and a dark zone layer in fluid connection with the light zone layer. Microalgal cells in the culture solution of the light zone layer can fully accept sunlight to as to undergo photosynthesis, and microalgal cells in the culture solution of the dark zone layer cannot fully accept sunlight. The device also includes a conveying instrument, which is configured to drive the culture solution to flow from the dark zone layer to the light zone layer. Specifically, the average residence time of the microalgal cells in the culture solution in the light zone layer is 0.5-10min. By dividing a runway pool into the light zone layer and the dark zone layer and controlling the average residence time of the microalgal cells in the culture solution in the light zone layer, efficient utilization of the natural lighting condition by the microalgal cells can be realized.

Description

technical field [0001] The invention relates to a device and method for microalgae scale cultivation, in particular to an open device and method for microalgae scale cultivation. Background technique [0002] With the gradual depletion of reserves of fossil fuels such as oil and coal, the continuous increase of carbon dioxide emissions and the increasing global warming, human survival and development are already facing enormous challenges. Using biomass as energy is one of the main ways to alleviate the current energy crisis and environmental problems. Microalgae can use solar energy, carbon dioxide and water through photosynthesis to synthesize oil, starch, carbohydrates and a variety of high value-added bioactive substances, and the growth cycle of microalgae is short, and its biomass accumulation capacity is higher than that of terrestrial plants. Therefore, microalgae are receiving more and more attention as a potential raw material for renewable energy production. How...

AI Technical Summary

Problems solved by technology

[0007] However, in the device for cultivating microalgae on a large scale, because the photobioreactor 103 has a certain height (generally higher than 1.5m), the circulation of the culture solution is realized by the liquid pump 2, which causes the problem of excessive energy consumption; Bioreactor 3 itself still has problems such as high cost, high energy consumption, difficult to clean, difficult to scale up, etc.; because the coupling system is a fixed device, it is difficult to efficiently use the natural light conditions that change year by year

Images