Effects of light-emitting diodes under capped daily energy consumption with combinations of electric power and photoperiod on cultivation of Chlorella pyrenoidosa. (April 2016)

• Record Type: Journal Article
• Authors: Li, Jinhao; Bin, Hui; Lin, Jian; Chen, Feng; Miao, Xiaoling
• Is Part Of: Bioresource technology. Volume 205(2016)
• Page Start: 126
• Page End: 132
• Publication Date: 2016-04
• Subjects: Chlorella pyrenoidosa -- Light-emitting diodes -- Electric power -- Photoperiod -- Capped energy consumption; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.01.041
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Highest growth rate and efficiency were obtained at different light intensities. Growth efficiency and growth rate were simultaneously improved by a novel method. The order of them under different LEDs were white > blue > red. The generation of chlorophyll was more sensitive to light combinations under blue. Abstract: Effects of white light-emitting diodes (LEDs) with different light intensities at photoperiod of 18:6 h on Chlorella pyrenoidosa growth were investigated. The microalgae exhibited the highest growth rate 89.0 mg L −1 d −1 and growth efficiency 97.8 mg L −1 KWh −1 at 110 and 90 μmol m −2 s −1, respectively. Based on the discovery of this asynchronous phenomenon between growth rate and growth efficiency, influences of LEDs (red, blue and white) under capped daily energy consumption (0.80 KWh d −1 ) with combinations of electric power (33.3, 44.4 and 66.6 w) and photoperiod (24:0, 18:6 and 12:12 h) were further investigated. The highest growth efficiency 106.4 mg L −1 KWh −1 and growth rate 85.1 mg L −1 d −1 were both obtained under white-33.3 w-24 h. Growth efficiency and growth rate were simultaneously improved 1.1 times through this method above. The order of growth efficiency under different LEDs were white > blue > red.