Method for directly sealing CO2 from air by inducing water through microorganisms

Abstract

The invention provides a method for directly sealing CO2 from air by inducing water through microorganisms. The method specifically comprises the following steps: (1) adding alga strains into the water; (2) pumping a nitrogen source, and culturing algae until the pH value of the water rises; and (3) guiding out the water to be in contact with air to absorb carbon dioxide in the air. The algae andnitrate nitrogen are added into the water under the induction action of microorganisms, the pH value of the water is increased, and the high-alkalinity water is in contact with air to adsorb CO2 in the air and seal the CO2 in the water in the form of dissolved HCO3<-> and CO3<2->, so the purpose of sealing a large amount of CO2 is achieved. The sealing and storing cost is remarkably reduced by using an MI-DAC technology, reaches 25-30 dollars / t CO2, and is lower than carbon subsidy, so the production burden of an enterprise is reduced.

Description

technical field [0001] The invention belongs to the field of environmental engineering and environmental protection, and more particularly relates to a method for directly sequestering CO from the air by inducing water bodies through microorganisms 2 Methods. Background technique [0002] Although in response to global warming, the utilization rate and energy efficiency of renewable energy are increasing. After three years of stagnation, global carbon dioxide emissions have surged sharply in the past two years, with growth rates of 2% (2017) and 2.7% (2018). Negative emission technologies (NETs) will be an irreplaceable response for the next 20 to 30 years, and this view will only be further strengthened if we are to keep the use of fossil fuels while keeping the temperature rise at 1.5°C by the end of the century . It is currently estimated that the removal of CO from the air by NETs technology by the end of the world 2 The amount is about 100-1000Gt. In view of the re...

AI Technical Summary

Problems solved by technology

Existing DAC technology needs to be equipped with high-pressure or corrosion-resistant reactors, high investment in fixed assets, and difficult equipment maintenance

[0004] while the traditional CO 2 The capture is also injected into the ground by pressurization, such as Chinese patent application number: 201210497862.0, etc., but the pressurization, transportation, and monitoring in this process will bring high economic costs and potential safety hazards

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