title: Effects of light-emitting diodes under capped daily energy consumption with combinations of electric power and photoperiod on cultivation of Chlorella pyrenoidosa.
abstract: 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 90μmolm(-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 (0.80KWh 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(-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.
authors.affiliation: State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Biomass Energy Research Center, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Environment and Energy Exchange Co., LTD, B1, No. 121, North Zhongshan No. 1 Road, Shanghai 200083, China.
authors.forename: Jinhao
authors.initials: J
authors.lastname: Li
authors.affiliation: Shanghai Environment and Energy Exchange Co., LTD, B1, No. 121, North Zhongshan No. 1 Road, Shanghai 200083, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Bin
authors.affiliation: Shanghai Environment and Energy Exchange Co., LTD, B1, No. 121, North Zhongshan No. 1 Road, Shanghai 200083, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Biomass Energy Research Center, Shanghai Jiao Tong University, Shanghai 200240, China; State Key Laboratory of Motor Vehicle Biofuel Technology, Nanyang 473000, China. Electronic address: miaoxiaoling@sjtu.edu.cn.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Miao
mesh_terms: D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods; D002708:Chlorella / Q000254:growth & development / Q000502:physiology*; D004560:Electricity; D008027:Light; D058086:Microalgae / Q000254:growth & development / Q000502:physiology; D017440:Photoperiod
keywords: Capped energy consumption; Chlorella pyrenoidosa; Electric power; Light-emitting diodes; Photoperiod