Effect of initial biomass-specific photon supply rate on fatty acid accumulation in nitrogen depleted Nannochloropsis gaditana under simulated outdoor light conditions

Jorijn H. Janssen; Jasper L.S.P. Driessen; Packo P. Lamers; René H. Wijffels; Maria J. Barbosa

doi:10.1016/j.algal.2018.10.002

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Effect of initial biomass-specific photon supply rate on fatty acid accumulation in nitrogen depleted Nannochloropsis gaditana under simulated outdoor light conditions

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Effect of initial biomass-specific photon supply rate on fatty acid accumulation in nitrogen depleted Nannochloropsis gaditana under simulated outdoor light conditions

Jorijn H. Janssen, Jasper L.S.P. Driessen, Packo P. Lamers, René H. Wijffels and Maria J. Barbosa

Algal research (Amsterdam), Vol.35, pp.595-601

11/01/2018

DOI: 10.1016/j.algal.2018.10.002

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Abstract

Triacylglycerol (TAG) accumulation in the microalgae Nannochloropsis gaditana is induced by nitrogen starvation and dependent on the light supplied. We studied under simulated outdoor light conditions the effect of supplied light on the TAG yield by varying the biomass-specific photon supply rate present at the onset of nitrogen starvation. High, intermediate and low average biomass-specific photon supply rates (26, 11 and 6 μmol g−1 s−1) were achieved by applying equal incident light intensity to different biomass concentrations (1.2, 2.9 and 5.4 g L−1). The intermediate biomass-specific photon supply rate resulted in the highest time-averaged TAG yield on light; 0.09 gTAG molph−1. Sub-optimal yields were attributed to photosaturation, photoinhibition, light falling through reactor without being absorbed and high maintenance requirements. The biomass-specific photon supply rate is important to optimize TAG production by microalgae. •Initial biomass-specific photon supply rate affects TAG yield on light.•Different photon supply rates were achieved by changing biomass concentration.•Photon supply rate 11 μmol g−1 s−1 resulted in highest TAG yield of 0.09 g molph−1.•Biomass-specific photon supply rate is important to optimize for TAG production.

Biomass-specific photon supply rate

Initial biomass concentration

Nannochloropsis gaditana

Nitrogen starvation

Triacylglycerol

Details

Title: Subtitle: Effect of initial biomass-specific photon supply rate on fatty acid accumulation in nitrogen depleted Nannochloropsis gaditana under simulated outdoor light conditions
Creators: Jorijn H. Janssen - Wageningen University & Research
Jasper L.S.P. Driessen - Wageningen University & Research
Packo P. Lamers - Wageningen University & Research
René H. Wijffels - Nord University
Maria J. Barbosa - Bioprocess Engineering, AlgaePARC, Wageningen University and Research, P.O. Box 16, 6700 AA Wageningen, the Netherlands
Resource Type: Journal article
Publication Details: Algal research (Amsterdam), Vol.35, pp.595-601
DOI: 10.1016/j.algal.2018.10.002
ISSN: 2211-9264
eISSN: 2211-9264
Publisher: Elsevier B.V
Grant note: DOI: 10.13039/100011102, name: Seventh Framework Programme, award: 613588
Language: English
Date published: 11/01/2018
Academic Unit: International Programs; Spanish and Portuguese
Record Identifier: 9984397910402771

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