Intensity of blue LED light: A potential stimulus for biomass and lipid content in fresh water microalgae Chlorella vulgaris

•Blue LED intensity and photoperiods influence Chlorella vulgaris growth rates.•Light intensities used; 100, 200 and 300μmolm−2s−1 at three photoperiod cycles.•Growth was maximum at blue LED of 200μmolm−2s−1 and photoperiod of 12:12h L:D.•C. vulgaris grows faster in blue LED compared to white fluore...

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Bibliographic Details
Published in:Bioresource technology Vol. 148; pp. 373 - 378
Main Authors: Atta, Madiha, Idris, Ani, Bukhari, Ataullah, Wahidin, Suzana
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01.11.2013
Elsevier
Subjects:
Acclimatization
Acclimatization - radiation effects
Biodiesel
Biological and medical sciences
Biomass
biosynthesis
Blue LED intensity
blue light
C. vulgaris
Cell Count
Chlorella vulgaris
Chlorella vulgaris - cytology
Chlorella vulgaris - growth & development
Chlorella vulgaris - radiation effects
Cultivation
Culture
cytology
Fresh water
freshwater
Fundamental and applied biological sciences. Psychology
growth & development
Light
Light and dark regime
light intensity
light quality
Light-emitting diodes
Lipid content
Lipids
Lipids - biosynthesis
microalgae
Microalgae - cytology
Microalgae - growth & development
Microalgae - radiation effects
Photoperiod
radiation effects
Specific growth rate
Time Factors
White light
C. vulgaris
Blue LED intensity
Light and dark regime
Specific growth rate
Lipid content
Scotophase
Stimulus
Growth rate
Algae
Chlorella vulgaris
Fresh water
Fat content
Biomass
Chlorophyceae
Light emitting diode
Photophase
Chlorophyta
Alga
Blue light
Microorganism
C vulgaris
ISSN:0960-8524, 1873-2976, 1873-2976
Online Access:Get full text
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Summary:•Blue LED intensity and photoperiods influence Chlorella vulgaris growth rates.•Light intensities used; 100, 200 and 300μmolm−2s−1 at three photoperiod cycles.•Growth was maximum at blue LED of 200μmolm−2s−1 and photoperiod of 12:12h L:D.•C. vulgaris grows faster in blue LED compared to white fluorescent light.•Highest growth rate corresponds to highest lipid content of C. vulgaris. Light quality and the intensity are key factors which render microalgae as a potential source of biodiesel. In this study the effects of various intensities of blue light and its photoperiods on the growth and lipid content of Chlorella vulgaris were investigated by using LED (Light Emitting Diode) in batch culture. C. vulgaris was grown for 13days at three different light intensities (100, 200 and 300μmolm−2s−1). Effect of three different light and dark regimes (12:12, 16:08 and 24:00h Light:Dark) were investigated for each light intensity at 25°C culture temperature. Maximum lipid content (23.5%) was obtained due to high efficiency and deep penetration of 200μmolm−2s−1 of blue light (12:12 L:D) with improved specific growth (1.26d−1) within reduced cultivation time of 8days. White light could produce 20.9% lipid content in 10days at 16:08h L:D.
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ISSN:0960-8524
1873-2976
1873-2976
DOI:10.1016/j.biortech.2013.08.162