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Li J.,Shanghai JiaoTong University | Li J.,Shanghai Environment and Energy Exchange Co. | Bin H.,Shanghai Environment and Energy Exchange Co. | Lin J.,Shanghai Environment and Energy Exchange Co. | And 3 more authors.
Bioresource Technology | Year: 2016

Effects of white light-emitting diodes (LEDs) with different light intensities at photoperiod of 18:6h on Chlorella pyrenoidosa growth were investigated. The microalgae exhibited the highest growth rate 89.0mgL-1d-1 and growth efficiency 97.8mgL-1KWh-1 at 110 and 90μmolm-2s-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 (0.80KWh d-1) with combinations of electric power (33.3, 44.4 and 66.6w) and photoperiod (24:0, 18:6 and 12:12h) were further investigated. The highest growth efficiency 106.4mgL-1KWh-1 and growth rate 85.1mgL-1d-1 were both obtained under white-33.3w-24h. Growth efficiency and growth rate were simultaneously improved 1.1 times through this method above. The order of growth efficiency under different LEDs were whitered. © 2016 Elsevier Ltd.


PubMed | Shanghai Environment and Energy Exchange Co. and Shanghai JiaoTong University
Type: | Journal: Bioresource technology | Year: 2016

Effects of white light-emitting diodes (LEDs) with different light intensities at photoperiod of 18:6h on Chlorella pyrenoidosa growth were investigated. The microalgae exhibited the highest growth rate 89.0mgL(-1)d(-1) and growth efficiency 97.8mgL(-1)KWh(-1) at 110 and 90molm(-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 (0.80KWhd(-1)) with combinations of electric power (33.3, 44.4 and 66.6w) and photoperiod (24:0, 18:6 and 12:12h) were further investigated. The highest growth efficiency 106.4mgL(-1)KWh(-1) and growth rate 85.1mgL(-1)d(-1) were both obtained under white-33.3w-24h. 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.

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