Method for supplementing fermentation raw material by microbial fermentation tail gas CO2 immobilized by microalgae culture

Abstract

The invention relates to CO2 emission reduction and recycling technologies, and discloses a method for adopting microalgae culture immobilized microbe fermentation tail gas CO2 as a supplementation fermentation raw material. According to the invention, tail gas in a microbe fermentation tank is directly introduced into a microalgae culture illumination bioreactor; conditions such as illumination, temperature, and ventilation are controlled; proper inorganic nutrient salts are added; CO2 in microbe fermentation tail gas is adopted as a carbon source for culturing microalgae; biomasses such as carbohydrates and proteins are accumulated; the biomasses are converted into raw materials such as carbon and nitrogen sources needed by fermentation through pretreatment; and the raw materials are delivered back to the microbe fermentation system to be utilized as a fermentation supplementation raw material. With the method provided by the invention, emission reduction and recycling of the microbe fermentation tail gas CO2 are realized; grain raw material consumption of microbe fermentation is reduced; and good environmental and social benefits are provided.

Description

technical field [0001] The invention relates to the cultivation of microalgae and the production of CO by microbial fermentation 2 Emission reduction and recycling technology, specifically the use of CO produced by microbial fermentation 2 As a carbon source for the growth of microalgae, microalgae are cultivated in photobioreactors to accumulate biomass such as carbohydrates and proteins, which are used as supplementary raw materials for microbial fermentation through pretreatment. This technology can be used for tail gas purification of microbial fermentation plants to achieve CO 2 Reduce emissions and recycle. Background technique [0002] Microbial fermentation produces target products (such as ethanol, amino acids, antibiotics, etc.) while producing a large amount of by-product CO 2 , are currently discharged directly due to the lack of economically viable utilization channels. This not only causes a waste of resources, more importantly, CO 2 A large amount of emis...

AI Technical Summary

Problems solved by technology

[0005] At present, more attention is paid to the use of CO in flue gas produced by industries such as thermoelectricity and metallurgy at home and abroad. 2 For the cultivation of microalgae, there are also some reports on the use of microalgae as raw materials to ferment and produce ethanol. For the coupling operation of microbial fermentation systems and microalgae cultivation systems to achieve CO 2 Emissions reduction and recycling are still under-reported

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