Enhanced carbon dioxide fixation of Chlorella vulgaris in microalgae reactor loaded with nanofiber membrane carried iron oxide nanoparticles

Hongyan Ren; Jing Ni; Mingwei Shen; Duan Zhou; Fubao Sun; Pau Loke Show

doi:10.1016/j.biortech.2023.129176

Enhanced carbon dioxide fixation of Chlorella vulgaris in microalgae reactor loaded with nanofiber membrane carried iron oxide nanoparticles

Bioresour Technol. 2023 Aug:382:129176. doi: 10.1016/j.biortech.2023.129176. Epub 2023 May 13.

Authors

Hongyan Ren¹, Jing Ni¹, Mingwei Shen¹, Duan Zhou¹, Fubao Sun², Pau Loke Show³

Affiliations

¹ School of Environment Science and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Wuxi 214122, China.
² Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
³ Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China; Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates. Electronic address: Pauloke.Show@ku.ac.ae.

PMID: 37187334
DOI: 10.1016/j.biortech.2023.129176

Abstract

To improve the CO₂ dissolution and carbon fixation in the process of microalgae capturing CO₂ from flue gas, a nanofiber membrane containing iron oxide nanoparticles (NPsFe₂O₃) for CO₂ adsorption was prepared, and coupled with microalgae utilization to achieve carbon removal. The performance test results showed that the largest specific surface area and pore size were 8.148 m² g^-1 and 27.505 Å, respectively, when the nanofiber membrane had 4% NPsFe₂O₃. Through CO₂ adsorption experiments, it was found that the nanofiber membrane could prolong the CO₂ residence time and increase CO₂ dissolution. Then, the nanofiber membrane was used as a CO₂ adsorbent and semifixed culture carrier in the Chlorella vulgaris culture process. The results showed that compared with the group without nanofiber membrane (0 layer), the biomass productivity, CO₂ fixation efficiency and carbon fixation efficiency of Chlorella vulgaris with 2 layers of membranes increased by 1.4 times.

Keywords: Biofixation; Carbon dioxide; Chlorella vulgaris; Electrospinning; Nanomaterials.

MeSH terms

Biomass
Carbon Cycle
Carbon Dioxide
Chlorella vulgaris*
Magnetic Iron Oxide Nanoparticles
Microalgae*
Nanofibers*

Substances

Carbon Dioxide