Photobioreactor capable of realizing high-efficiency carbon dioxide immobilization

Abstract

The invention discloses a photobioreactor capable of realizing high-efficiency carbon dioxide immobilization. The photobioreactor comprises a flat photobioreactor, a metal supporting rack, an algae liquid spraying unit, an algae liquid circulating system and an industrial waste gas pretreatment unit, wherein the flat photobioreactor is connected to the industrial waste gas pretreatment unit; the metal supporting rack is installed on the upper surface of the flat photobioreactor, and is used for supporting and fixing the algae liquid spraying unit; the algae liquid circulating system comprisesan external circulating pipe and a power system, the external circulating pipe is used for communicating the flat photobioreactor and the algae liquid spraying unit and the power system is used for driving the algae liquid circulating; and the algae liquid spraying unit comprises a sprayer and a transparent curtain, the sprayer is used for dispersing algae liquid flowing down and the transparent curtain is used for preventing the algae liquid from splashing and preventing the algae liquid from contacting the external environment. Based on the design scheme of the novel spraying type photobioreactor provided by the invention, high-density cultivation of microalgae and high-efficiency absorption of carbon dioxide in industrial waste gas can be realized.

Description

technical field [0001] The invention relates to a photobioreactor, in particular to a photobioreactor for realizing efficient fixation of carbon dioxide. Background technique [0002] In recent years, global warming has drawn widespread attention, mainly due to the increase in the concentration of greenhouse gases such as carbon dioxide in the atmosphere. According to ICPP (United Nations Intergovernmental Panel on Climate Change) statistics, the concentration of carbon dioxide in the atmosphere has increased from 0.028% before the industrial revolution to 0.036%. The increase in carbon dioxide concentration will cause sea level rise, flooding, and changes in the distribution of ecosystems. A series of environmental problems, such as environmental pollution, seriously threaten the survival of human beings. Industrial waste gas is the main source of carbon dioxide in the atmosphere. Taking fossil fuel power plants as an example, the scale of ordinary fossil fuel power plants...

AI Technical Summary

Problems solved by technology

[0008] (1) The traditional bait microalgae photobioreactor is not constructed for efficient carbon fixation by microalgae, and its carbon dioxide removal rate is far lower than the theoretical rate of carbon fixation by microalgae. It needs to be improved before it can be used in microalgae. Algal carbon sequestration production and research;

[0009] (2) The light energy utilization rate of microalgae in traditional photobioreactors is low. With the increase of algae cell density, the blocking effect between cells is more obvious, which seriously affects the growth of microalgae and the absorption of carbon dioxide;

[0010] (3) Traditional photobioreactors generally use compressed air in the form of bubbling. The contact area between algae cells and air bubbles is small and the contact time is short, which limits the absorption rate of algae cells to carbon dioxide to a certain extent;

[0011] (4) The temperature control effect of the traditional photobioreactor is not good, and the temperature is only cooled by water cooling or air cooling, which consumes a lot of energy;

[0012] (5) In order to increase the efficiency of gas-liquid transfer, a hydrophobic aeration membrane is usually installed at the bottom of the reactor to generate small and uniform air bubbles, but the hydrophobic aeration membrane is easy to block, which will also increase the energy consumption of ventilation

[0013] It can be seen that the existing technology is difficult to achieve efficient fixation of carbon dioxide, so it is necessary to design a new type of photobioreactor

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