Light-Emitting Diode Power Conversion Capability and CO 2 Fixation Rate of Microalgae Biofilm Cultured Under Different Light Spectra

Hao Yuan, Yi Wang, Yanaoming Xi, Zeyi Jiang, Xinru Zhang, Xinyu Wang and Xinxin Zhang
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Hao Yuan: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Yi Wang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Yanaoming Xi: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Zeyi Jiang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Xinru Zhang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Xinyu Wang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Xinxin Zhang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

Energies, 2020, vol. 13, issue 7, 1-10

Abstract: Microalgae biofilm-based culture has attracted much interest due to its high harvest efficiency and low energy requirements. Using light-emitting diodes (LEDs) as light source for microalgae culture has been considered as a promising choice to enhance the economic feasibility of microalgae-based commodities. In this work, the LED power conversion capability and CO 2 fixation rate of microalgae biofilms ( Chlorella ellipsoidea and Chlorella pyrenoidosa ) cultured under different light spectra (white, blue, green and red) were studied. The results indicated that the power-to-biomass conversion capabilities of these two microalgae biofilms cultured under blue and white LEDs were much higher than those under green and red LEDs ( C. ellipsoidea : 32%–33% higher, C. pyrenoidosa : 34%–46% higher), and their power-to-lipid conversion capabilities cultured under blue LEDs were 61%–66% higher than those under green LEDs. The CO 2 fixation rates of these two biofilms cultured under blue LEDs were 13% and 31% higher, respectively, than those under green LEDs. The results of this study have important implications for selecting the optimal energy-efficient LEDs using in microalgae biofilm-based culture systems.

Keywords: microalga; biofilm-based cultivation; light spectrum; power conversion capability; CO 2 fixation rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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