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Method for efficiently capturing and utilizing CO2 from air based on microalgae biotechnology

A biotechnology, CO2 technology, applied in the field of efficient capture and utilization of CO2 from the air based on microalgae biotechnology, can solve the problems of carbon mass transfer and carbon utilization out of sync, and achieve the goals of reducing production costs, efficient utilization, and efficient growth Effect

Pending Publication Date: 2020-05-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The important role of the carbon pool is to solve the asynchronous contradiction between carbon mass transfer and carbon utilization

Method used

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  • Method for efficiently capturing and utilizing CO2 from air based on microalgae biotechnology
  • Method for efficiently capturing and utilizing CO2 from air based on microalgae biotechnology
  • Method for efficiently capturing and utilizing CO2 from air based on microalgae biotechnology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The influence of carbon pool on the growth of source spirulina under the continuous light of embodiment 1

[0049] First prepare the following medium without inorganic carbon: 2.5g L -1 NaNO 3 , 1.0g L -1 NaCl, 0.04gL - 1 CaCl 2H 2 O, 1.0 g L -1 K 2 SO 4 , 0.5g L -1 K 2 HPO 4 , 0.2g L -1 MgSO 4 ·7H 2 O, 0.01gL -1 FeSO 4 ·7H 2 O, 1.979 g L -1 MoCl 2 4H 2 O, 3.092 L -1 h 3 BO 3 , 0.484g L -1 NaMo 4 2H 2 O, 0.23 g L -1 ZnSO 4 ·7H 2 O, 0.183 L -1 NaVO 3 , 0.048g L -1 CoCl 2 ·6H 2 O, 0.2 g L -1 CuSO 4 ·5H 2 O. NaHCO in a molar ratio of 1:1 3 –Na 2 CO 3 Ratio, add a total of 0.3mol L to the above medium without inorganic carbon -1 Inorganic carbon, the medium with an initial pH of 10.0, respectively, was obtained. As a control, add 0.3mol L -1 Sodium chloride to prepare medium containing no inorganic carbon at the same salinity

[0050] Inject the above 600mL medium containing inorganic carbon and not containing inorganic carbon in...

Embodiment 2

[0053] Example 2 Effects of different initial pH values ​​on the growth of Spirulina and its carbon fixation

[0054] First prepare the medium that does not contain inorganic carbon as described in Example 1, then according to the NaHCO of molar ratio 1:1,1:4,1:9 3 –Na 2 CO 3 Ratio, add a total of 0.3mol L to the above medium without inorganic carbon -1 Inorganic carbon, respectively, resulted in media with initial pHs of 10.0, 10.5 and 11.0, respectively.

[0055] Inject 600mL of the above-mentioned medium with an initial pH of 10.0, 10.5 and 11.0 into a bubbling photobioreactor with a height of 30cm and a diameter of 5.0cm, and add 100ml L -1 Air is blown in at a rate. As a control, feeding into another reactor containing medium with an initial pH of 10.0 removed CO 2 air, the ventilation rate remains the same.

[0056] Finally according to 0.232g L -1 The density of Spirulina was inserted into Spirulina, and microalgae were cultured according to the following culture...

Embodiment 3

[0063] Example 3 Effect of initial bicarbonate concentration on microalgal culture and CO 2 Examples of Fixed Efficiency Effects

[0064] First prepare the culture medium that does not contain inorganic carbon as described in Example 1, then according to the NaHCO of molar ratio 1:1 3 –Na 2 CO 3 Ratio, add a total of 0.1, 0.3 and 0.5 mol L to the above medium without inorganic carbon, respectively -1 Inorganic carbon, respectively, the initial carbon source concentrations were 0.1, 0.3 and 0.5mol L -1 And the culture medium with initial pH of 10.0.

[0065] Finally according to 0.223g L -1 The density inserts Spirulina, and cultivates microalgae according to the culture method and culture condition described in embodiment 1, wherein the air that feeds is normal air, does not remove wherein CO 2 . The culture time was set to 12 days.

[0066] Such as Figure 4 As shown in a, the initial carbon source concentration has a significant impact on the growth of microalgae, a...

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Abstract

The invention relates to the technical field of carbon emission reduction based on a biotechnology, and provides a method for efficiently capturing and immobilizing CO2 from air based on a microalgaebiotechnology under an extreme alkaline condition. A prepared culture medium contains high-concentration bicarbonate, the pH value is higher than 10.0, low-concentration CO2 in the air is efficientlyabsorbed, the absorbed CO2 is stored in a high-concentration carbonate form to form a carbon pool, and therefore a sufficient carbon source is provided for microalgae growth when illumination is sufficient. According to the technology, CO2 in the air is continuously absorbed day and night, a large number of carbon sources is prepared for efficient growth of microalgae in advance when sunlight is sufficient in the daytime, the natural rhythm is better met, and efficient fixation and utilization of CO2 in the air are achieved. More importantly, the energy of air compression and transportation inthe process can be completely provided by natural energy. Therefore, the method can reduce the biomass production cost and the CO2 immobilization cost of the microalgae at the same time, and has great application potential.

Description

technical field [0001] The present invention relates to CO production based on microalgae biomass 2 The field of emission reduction technology, specifically related to microalgae cultivation and CO 2 Mitigation methods, in particular involving a technology for the efficient fixation of carbon dioxide from the air using extreme halophilic algae. Background technique [0002] Global warming and the huge environmental problems it brings are a major problem facing and must be solved in the sustainable development of human beings, and this is mainly caused by the large amount of man-made emissions of CO 2 caused by the greenhouse effect. Therefore, CO 2 The emission reduction has become an important direction of social development. To solve this problem, a variety of CO 2 Emission reduction technologies, such as bioenergy combined with carbon capture and storage technology, CO 2 Chemical adsorption emission reduction technology, and mineral carbonization and other emission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/62C12N1/20C12R1/01
CPCB01D53/62B01D53/84B01D2251/95B01D2257/504C12N1/20Y02P20/59Y02A50/20
Inventor 迟占有朱陈霸
Owner DALIAN UNIV OF TECH
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