The Production of High Phycocyanin by Applications of Red Light-Emitting Diodes (LEDs) In Vitro Algae Growth on Spirulina platensis

Authors	Huynh Van-Hieu¹, Luong Quang-Tuong², Bien Cong-Doan¹
Affiliations	¹Faculty of Biotechnology, Nguyen Tat Thanh University, Ho Chi Minh City, 70000, Vietnam ²Faculty of Food and Environmental Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, 70000, Vietnam
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Issue	Volume 13, Year 2021, Number 3
Dates	Received 12 January 2021; revised manuscript received 18 June 2021; published online 25 June 2021
Citation	Huynh Van-Hieu, Luong Quang-Tuong, Bien Cong-Doan, J. Nano- Electron. Phys. 13 No 3, 03034 (2021)
DOI	https://doi.org/10.21272/jnep.13(3).03034
PACS Number(s)	85.60.Jb
Keywords	LEDs, Algae growth, Spirulina platensis.
Annotation	Spirulina platensis are cultured at a large scale around the world primarily for providing food supplements for human as well as animal diets. Various light-emitting diodes (LEDs) with different light wavelengths are conducted to explore the positive effects of light source on photoautotrophic cultivation of Spirulina platensis in this study. From the experimental results, red LED λmax = 632 nm exhibits the highest specific growth rate under continuous illumination (192,5 μmol m – 2 s – 1). Among them, red LED light in experiment 2 is determined as the best light for biomass and phycocyanin, results present that algae grew up to the 7th day and then the maximum density of biomass was 1.231 ± 0.0005 g L – 1, this developed cultivation takes 9 days, yielding 3.54 mg mL – 1 C-phycocyanin with a purity of 2.0 gram from Spirulina platensis, followed by red LED in experiment 1, red LED in experiment 3 and white LED in control. This result is proposed to fit the specific growth rates of Spirulina platensis and high C-phycocyanin from red LED λmax = 632 nm in the experiment 2 to determine this wavelength being important for algae growth with high C-phycocyanin. Hence, the information LEDS about the biopotential of this attractive alga for industrial application needs further research.
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