Landfill gas film separation coupling microalgae carbon sequestration technology

Abstract

The invention discloses a landfill gas film separation coupling microalgae carbon sequestration technology. According to the technology, a landfill gas methane purification board, a landfill gas burntcarbon dioxide gathering board and a microalgae carbon sequestration board are included; methane and carbon dioxide are separated through a film separation system, and supercritical carbon dioxide can be obtained while the methane component concentration in landfill gas is increased; after the landfill purifies the methane component concentration, combustion and power generation are performed, combusted exhaust gas passes through the film separation system to obtain supercritical carbon dioxide, and retaining gas supplies a carbon source for the microalgae carbon sequestration board; the microalgae carbon sequestration board utilizes low-concentration carbon dioxide of the landfill gas burnt carbon dioxide gathering board and the landfill factory floor space to obtain a lipid processing product and a microalgae powder processing product, meanwhile, microalgae particles obtained after lipid is extracted can be used for increasing the organic content in garbage components of the landfill factory, and the economic benefits of the technology are improved while the landfill gas yield is increased.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide capture, energy saving and emission reduction, in particular to a process for landfill gas membrane separation coupled with microalgae carbon fixation. Background technique [0002] With the development of industry, the content of carbon dioxide components in the atmosphere has increased rapidly, and the emission of greenhouse gases mainly carbon dioxide has led to global warming and sea level rise, which is not conducive to the long-term development of human beings. According to the fourth assessment report of the United Nations Intergovernmental Panel on Climate Change (IPCC), in the total warming effect of greenhouse gases, carbon dioxide contributes about 63%, and methane contributes about 18%, of which the carbon dioxide equivalent per ton of methane is 25. Methane is the key to rapidly slowing down climate change. The impact of carbon dioxide is relatively long-term, and the impact o...

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Problems solved by technology

[0007] At present, the carbon dioxide capture technology mainly includes solvent absorption method, adsorption method, membrane separation method, low temperature cryogenic separation method, etc. At present, the alcohol amine absorption method is the most widely used, but the regeneration temperature of the absorbent is relatively high, and the energy consumption required is relatively large. , the leakage or volatilization of chemical absorbents will cause environmental pollution

Membrane separation method has broad application prospects due to its small footprint, low energy consumption, no phase change, and easy operation. However, when the pressure of flue gas is low and the concentration of carbon dioxide is low, the actual operation requires Increase the concentration of flue gas components through the compressor. When the purity meets no less than 95%, the required membrane area and the energy consumption of equipment such as compression will also increase with the increase of the collection rate. This is the current obstacle. Main Factors of Industrial Application of Membrane Separation Method

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