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Effect of Light Intensity and Frequency of Flashing Light from Blue Light Emitting Diodes on Astaxanthin Production by Haematococcus pluvialis

Title
Effect of Light Intensity and Frequency of Flashing Light from Blue Light Emitting Diodes on Astaxanthin Production by Haematococcus pluvialis
Author
Katoh, Shigeo
Keywords
flashing light; blue light emitting diode; light intensity; astaxanthin; Haematococcus pluvialis
Issue Date
2008-03
Publisher
SOC BIOSCIENCE BIOENGINEERING JAPAN
Citation
JOURNAL OF BIOSCIENCE AND BIOENGINEERING, v. 105, No. 3, Page. 216-220
Abstract
Flashing light from blue light emitting diodes is an effective method for the reduction of energy consumption in the bioproduction of astaxanthin by Haematococcus pluvialis. We investigated the effects of light intensity and frequency on the final astaxanthin concentration in bioproduction by H. pluvialis grown mixotrophically. The final astaxanthin concentration under illumination with flashing light, with frequencies ranging from 25 to 200 Hz, was dependent on the light intensity and on the duty cycle and was equivalent, or higher, in comparison with that under illumination with continuous light at the same incident intensity. The light intensity determined the maximum attainable concentration of astaxanthin under continuous illumination. Under illumination with flashing light, the ratio of the final astaxanthin concentration to the maximum concentration at a specific light intensity was correlated to the duty cycle in the frequency range from 25 to 200 Hz. The effect of lower frequencies on enhanced astaxanthin production under flashing light was also studied; at levels as low as I Hz, higher final astaxanthin concentrations were observed under flashing light compared to concentrations attained under continuous light.
URI
https://www.sciencedirect.com/science/article/pii/S1389172308700550?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/80258
ISSN
1389-1723
DOI
10.1263/jbb.105.216
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ETC
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