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Coupled chemical absorption and biological conversion CO2 capturing method

A technology of biotransformation and chemical absorption, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve problems such as ammonia loss

Inactive Publication Date: 2019-03-12
TIANJIN UNIV
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a chemical absorption and biotransformation coupled CO 2 The capture method can solve the problem of ammonia suppression and ammonia loss while realizing the utilization of absorption liquid, and at the same time realize the growth of later products

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  • Coupled chemical absorption and biological conversion CO2 capturing method
  • Coupled chemical absorption and biological conversion CO2 capturing method

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Embodiment

[0028] The first step is to pre-cultivate three strains of Chlorella (L166, L38 and UTEX1602) under the condition of light intensity of 6000 lux, temperature of 30 ± 1 °C, and 5% carbon dioxide aeration, and inoculate them into four nitrogen sources under different conditions in the exponential phase. in the culture medium;

[0029] The second step is that the environmental conditions of the four mediums are: (0) pure BG11 medium; (1) with NH 4 HCO 3 To replace NaNO 3 The nitrogen-free BG11 medium; (2) with NH 4 HCO 3 To replace NaNO 3 Nitrogen-free BG11 medium with 5% CO 2 The simulated flue gas of , the ventilation rate is 20mL / min; (3) 4 HCO 3 To replace NaNO 3 nitrogen-free BG11 medium, and the nitrogen concentration was 248mg / L NH 4 HCO 3 It was added in three batches, 124 mg / L was added during inoculation, 62 mg / L was added on the 12th day of culture, and 62 mg / L was added on the 24th day. The remaining conditions are: light intensity of 6000 lux, temperature ...

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Abstract

The invention relates to the field of microalgal culture and carbon fixation, in particular to solving the problem of treating carbon dioxide absorbed ammonia wastewater through microalgae. The absorbed liquid can be treated at the premise of increasing microalgal yield; the yield of the products, such as microalgal proteins is increased; the inhibition on microalgal growth due to ammonia inhibition is overcome. The invention provides a coupled chemical absorption and biological carbon fixation method; wastewater from ammonia water that absorbs CO2 is used as a carbon source and nitrogen source to supply to microalgae for growth; ammonia inhibition in the microalgal culture process is relieved; material supplementing or gas introduction helps maintain that ammonia nitrogen concentration ina culture medium is not greater than 150 mg / L or pH of the culture medium is stable (stably 7-8) during microalgal culture.

Description

technical field [0001] The invention relates to the field of microalgae cultivation, and processes ammonia water to absorb CO2 waste liquid by microalgae, in particular to a CO2 coupling chemical absorption and biotransformation 2 capture method. Background technique [0002] In the traditional process, ammonia water absorbs CO 2 The resulting high energy consumption has always been an important issue. In order to solve the problem of energy consumption in the desorption process of the absorbing solution, this paper proposes to design a CO 2 combined ammonia absorption-microalgae stationary phase. 2 capture system. Therefore, ammonia water absorbs CO 2 The main substance produced is NH 4 HCO 3 As a nitrogen source and carbon source, it is added to the microalgae culture system to promote the growth of microalgae. At the same time, the algal flour produced by microalgae can extract nutrients such as polysaccharides, oils, and proteins. [0003] However, under alkaline...

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Application Information

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IPC IPC(8): C12N1/12C12R1/89
CPCC12N1/12
Inventor 宋春风谢美连邱依婷齐云刘庆岭纪娜
Owner TIANJIN UNIV
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