Lipid accumulation and CO2 utilization of Nannochloropsis oculata in response to CO2 aeration

Sheng Yi Chiu, Chien Ya Kao, Ming Ta Tsai, Seow Chin Ong, Chiun-Hsun Chen, Chih-Sheng Lin*

*Corresponding author for this work

Research output: Contribution to journalArticle

538 Scopus citations

Abstract

In order to produce microalgal lipids that can be transformed to biodiesel fuel, effects of concentration of CO2 aeration on the biomass production and lipid accumulation of Nannochloropsis oculata in a semicontinuous culture were investigated in this study. Lipid content of N. oculata cells at different growth phases was also explored. The results showed that the lipid accumulation from logarithmic phase to stationary phase of N. oculata NCTU-3 was significantly increased from 30.8% to 50.4%. In the microalgal cultures aerated with 2%, 5%, 10% and 15% CO2, the maximal biomass and lipid productivity in the semicontinuous system were 0.480 and 0.142 g L-1 d-1 with 2% CO2 aeration, respectively. Even the N. oculata NCTU-3 cultured in the semicontinuous system aerated with 15% CO2, the biomass and lipid productivity could reach to 0.372 and 0.084 g L-1 d-1, respectively. In the comparison of productive efficiencies, the semicontinuous system was operated with two culture approaches over 12 d. The biomass and lipid productivity of N. oculata NCTU-3 were 0.497 and 0.151 g L-1 d-1 in one-day replacement (half broth was replaced each day), and were 0.296 and 0.121 g L-1 d-1 in three-day replacement (three fifth broth was replaced every 3 d), respectively. To optimize the condition for long-term biomass and lipid yield from N. oculata NCTU-3, this microalga was suggested to grow in the semicontinuous system aerated with 2% CO2 and operated by one-day replacement.

Original languageEnglish
Pages (from-to)833-838
Number of pages6
JournalBioresource Technology
Volume100
Issue number2
DOIs
StatePublished - 1 Jan 2009

Keywords

  • Biomass
  • Carbon dioxide
  • Lipid
  • Nannochloropsis oculata

Fingerprint Dive into the research topics of 'Lipid accumulation and CO<sub>2</sub> utilization of Nannochloropsis oculata in response to CO<sub>2</sub> aeration'. Together they form a unique fingerprint.

  • Cite this