earticle

영어

Microalgae have been seen all over the seawater and fresh water. Specially, Spirulina maxima and Chlorella vulgaris are extensively use in human nutrition because it is a source of beneficial protein, unsaturated lipids and vitamins. In the study, light-emitting diodes (LEDs) with different light wavelengths (red, green, blue, white) and various levels of light intensity (750, 1500 and 3000 μmol m-2 s-1) were applied to explore the effect of light source on photoautotrophic cultivation of Spirulina maxima and Chlorella vulgaris. In the case of Spirulina maxima, red LED exhibited the highest specific growth rate of 0.035 h-1 in the exponential growth phase and the cell number of 3.1 x 106 ml-1 at the plateau under the illumination of 3000 μmol m-2 s-1, Whereas blue LED showed the least efficiency. Also, Chlorella vulgaris showed the highest specific growth rate of 0.019 h-1 and the cell number of 2.0 x 106 ml-1 under illumination of white LED (3000 μmol m-2 s-1). In comparing the economic efficiency of energy to biomass, the use of red LED and white LED gave the most effective performance for the photoautotrophic cultivation of Spirulina maxima and Chlorella vulgaris, respectively.