Preliminary Investigation of CO2 Sequestration by Chlorella sorokiniana TH01 in Single and Sequential Photobioreactors
Increasing accumulation of CO2 in the atmosphere mainly caused by fossil fuels combustion of human activities have resulted in adverse global warming. Therefore, searching for treatment methods for effective utilization of CO2 have received a great attention worldwide. Among various methods (e.g.,...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
H. : ĐHQGHN
2020
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| Subjects: | |
| Online Access: | http://repository.vnu.edu.vn/handle/VNU_123/74831 https://doi.org/10.25073/2588-1094/vnuees.4555 |
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| Institution: | Vietnam National University, Hanoi |
| Language: | English |
| Summary: | Increasing accumulation of CO2 in the atmosphere mainly caused by fossil fuels combustion of human activities have resulted in adverse global warming. Therefore, searching for
treatment methods for effective utilization of CO2 have received a great attention worldwide. Among
various methods (e.g., adsorption, absorption, storage, membrane technologies, etc.) have been
developed and applied, the sequestration of CO2 using microalgae has recently emerged as an
alternatively sustainable approach. In this work, a green microalgal strain Chlorella sorokiniana
TH01 was used to investigate its capability in sequestration of CO2 in laboratory scale. Results
indicated that the C. sorokiniana TH01 grew well under a wide range of CO2 concentration from
0.04% to 20% with maximum growth was achieved under CO2 aeration of 15%. In a single
photobioreactor (PBR) with 10 min empty bed residence time (EBRT), the C. sorokiniana TH01
only achieved CO2 fixation efficiency of 6.33% under continuous aeration of 15% CO2. Increasing
number of PBRs to 15 and connected in a sequence enhanced mean CO2 fixation efficiency up to
82.64%. Moreover, the CO2 fixation efficiency was stable in the range of 78.67 to 91.34% in 10
following days of the cultivation. Removal efficiency of NO3--N and PO43--P reached 82.54 –
90.25% and 95.33 – 98.02%, respectively. Our trial data demonstrated that the C. sorokiniana TH01
strain is a promising microalgal for further research in simultaneous CO2 mitigation via CO2
sequestration from flue gas as well as nutrients recycling from wastewaters. |
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