Journal
BIORESOURCE TECHNOLOGY
Volume 344, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.126260
Keywords
Odontella aurita; Fucoxanthin; Photobioreactor; Light spectrum; Internal illumination
Funding
- Basic and Applied Basic Research Foundation of Guangdong Province [2020A1515110802]
- National Natural Science Foundation of China [32002412]
- Guangzhou science and technology innovation program [201907010005]
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The research showed that red light was more suitable for cell growth and fucoxanthin accumulation in Odontella aurita. By optimizing the ratios of red and blue light, both biomass and fucoxanthin production were further promoted. The study represents a pioneering work in harnessing the PBR with internal illumination for hyper-production of microalgae-based fucoxanthin.
Fucoxanthin has multiple beneficial effects on human health. However, an efficient cultivation strategy for hyper-production of microalgae-based fucoxanthin has been seldom achieved. Here, an auto-controlled photobioreactor (PBR) installed internal light-emitting diodes illumination with adjustable spectra ratio was firstly used to culture Odontella aurita. The results showed that red light (RL) was more suitable for cell growth and fucoxanthin accumulation than blue light (BL) and white light. The biomass and fucoxanthin production were further promoted by optimizing the ratios of RL and BL, with 8:2 giving the highest productivities of 570 and 9.41 mg L-1 d-1, respectively, which is the highest fucoxanthin productivity ever reported under photoautotrophic cultivation. Pilot-scale cultivation demonstrated its promising feasibility in commercial fucoxanthin production. Our study represents a pioneering work of harnessing the PBR with internal illumination for hyper-production of microalgae-based fucoxanthin, and provides feasible strategies for high-efficient production of other value-added products in related species/strains.
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