Enhanced biomass and lipid production of Neochloris oleoabundans under high light conditions by anisotropic nature of light-splitting CaCO 3 crystal

Min Eui Hong, Byung Sun Yu, Anil Kumar Patel, Hong Il Choi, Sojin Song, Young Joon Sung, Won Seok Chang, Sang Jun Sim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The aim of this work was to study the anisotropic effect of crystalline CaCO 3 nanoparticles (CN)-driven multiple refraction/scattering from the CN-coated agglomerated cells on the rate of photosynthesis and the product yield under high light conditions in the freshwater microalgae Neochloris oleoabundans. The CN-coating via biomineralization significantly improved the biomass and lipid production of N. oleoabundans during second stage of autotrophic induction by sustaining relatively high rate of photosynthesis at high irradiance using the multiple-splitting effect of the anisotropic polymorphism. The CN were successfully produced, adsorbed and grown on the external cells under conditions of mild alkalinity (pH 7.5–8.0), mild CaCl 2 concentration (0.05 M) and under nitrogen starvation with strong light (400 µE m −2 s −1 ). Consequently, lipid content and productivity of N. oleoabundans cells cultured with 0.05 M CaCl 2 increased by 18.4% and 31.5%, respectively, compared to the cells cultured with 0.05 M CaCl 2 and acetazolamide to inhibit calcification.

Original languageEnglish
Article number121483
JournalBioresource Technology
Volume287
DOIs
Publication statusPublished - 2019 Sep 1

Keywords

  • Anisotropic CaCO crystal
  • CaCO biomineralization
  • Mild calcification method
  • Multiple light-splitting effect
  • Neochloris oleoabundans

ASJC Scopus subject areas

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

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