Study on Biological Fixation of High-Concentration CO₂ Using Chlorella Pyrenoidosa

Abstract:

CO₂ emissions have serious impact on the world economy, especially at high-concentration. Green algae are known to have a tolerance to high CO₂ level. In this paper, the rate of CO₂ fixation using Chlorella Pyrenoidosa was analyzed in different environments. 1) Chlorella Pyrenoidosa fixed CO₂ slowly in air, while this alga could rapidly grow in high-concentration CO₂ until CO₂ level was beyond 10%. At 25% CO₂, the rate of CO₂ fixation was lower than that at 10% CO₂, but still 1.18 times as higher as in air. 2) At lower initial inoculation density of Chlorella Pyrenoidosa, its growth rate was relatively high but the rate of CO₂ fixation was low. When initial inoculation density beyond 0.187×108cells/ml, the average rate of CO₂ fixation was ranged from 2.786 gCO₂/L·d to 2.847 gCO₂/L·d. 3) During the five days, the average rate of CO₂ fixation was 3.044 gCO₂/L·d in NaNO₃ resource. When NH₄Cl or NaNO₂ is regarded as N resource, the rate of CO₂ fixation was almost neglectable.

• Periodical: Advanced Materials Research (Volumes 343-344)
• Pages: 361-367
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.343-344.361
• Online since: September 2011
• Authors: Qi Peng Yang, Xiu Lin Wang, Xiao Yong Shi, Ke Qiang Li, Li Hong Yue
• Keywords: Algae, High-Concentration CO₂, Photosynthesis

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