Manipulation of light wavelength at appropriate growth stage to enhance biomass productivity and fatty acid methyl ester yield using Chlorella vulgaris

Dae Geun Kim, Changsu Lee, Seung Moon Park, Yoon E. Choi

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

LEDs light offer several advantages over the conventional lamps, thereby being considered as the optimal light sources for microalgal cultivation. In this study, various light-emitting diodes (LEDs) especially red and blue color with different light wavelengths were employed to explore the effects of light source on phototrophic cultivation of Chlorella vulgaris. Blue light illumination led to significantly increased cell size, whereas red light resulted in small-sized cell with active divisions. Based on the discovery of the effect of light wavelengths on microalgal biology, we then applied appropriate wavelength at different growth stages; blue light was illuminated first and then shifted to red light. By doing so, biomass and lipid productivity of C. vulgaris could be significantly increased, compared to that in the control. These results will shed light on a novel approach using LED light for microalgal biotechnology.

Original languageEnglish
Pages (from-to)240-248
Number of pages9
JournalBioresource technology
Volume159
DOIs
Publication statusPublished - 2014 May

Keywords

  • Biodiesel
  • Chlorella vulgaris
  • LED
  • Microalgal cultivation
  • Wavelength shift

ASJC Scopus subject areas

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

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