Novel effective bioprocess for optimal CO2 fixation via microalgae-based biomineralization under semi-continuous culture

Byung Sun Yu, Ha Eun Yang, Ranjna Sirohi, Sang Jun Sim

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the effects of microalgae-based biomineralization in a semi-continuous process (M-BSP) on biomass productivity and CO2 fixation rate were investigated. M-BSP significantly improved biomass production and CO2 fixation rate at the second stage of induction by sustaining relatively high photosynthetic rate without exposure to toxic substances (e.g., chlorellin) from aging cells using the microalgae Chlorella HS2. In conventional systems, cells do not receive irradiated light evenly, and many cells age and burst because of the long culture period. In contrast, in the M-BSP, the photosynthesis efficiency increases and biomass production is not inhibited because most of the cells can be harvested during shorter culture period. The accumulated biomass production and CO2 fixation rate of the HS2 cells cultured under M-BSP increased by 4.67- (25 ± 1.09 g/L) and 10.9-fold (30.29 ± 1.79 g/L day−1), respectively, compared to those cultured without the CaCl2 treatment.

Original languageEnglish
Article number128063
JournalBioresource technology
Volume364
DOIs
Publication statusPublished - 2022 Nov

Keywords

  • Biomass production
  • Biomineralization
  • CO fixation rate
  • Chlorella sp. HS2
  • Semi-continuous

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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