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

Jinhao Li; Hui Bin; Jian Lin; Feng Chen; Xiaoling Miao

doi:10.1016/j.biortech.2016.01.041

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

Bioresour Technol. 2016 Apr:205:126-32. doi: 10.1016/j.biortech.2016.01.041. Epub 2016 Jan 23.

Authors

Jinhao Li¹, Hui Bin², Jian Lin², Feng Chen³, Xiaoling Miao⁴

Affiliations

¹ 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.
² Shanghai Environment and Energy Exchange Co., LTD, B1, No. 121, North Zhongshan No. 1 Road, Shanghai 200083, China.
³ State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
⁴ 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.

PMID: 26826572
DOI: 10.1016/j.biortech.2016.01.041

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.

Keywords: Capped energy consumption; Chlorella pyrenoidosa; Electric power; Light-emitting diodes; Photoperiod.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Biotechnology / instrumentation*
Biotechnology / methods
Chlorella / growth & development
Chlorella / physiology*
Electricity
Light
Microalgae / growth & development
Microalgae / physiology
Photoperiod*