Performance of bioelectrochemical systems inoculated with Desmodesmus sp. A8 under different light sources |
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| Authors: | Yi-cheng Wu Yong Xiao Ze-jie Wang |
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| Institution: | 1. College of Environmental Science and Engineering, Xiamen University of Technology, Xiamen, China;2. CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China;3. CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China |
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| Abstract: | Light source can affect the stomata opening, photosynthesis process, and pigment content in microalgae cells. In this study, growth rate, chlorophyll a (chl a) content, and electrogenic capability of Desmodesmus sp. A8 were investigated under incandescent and fluorescent lamps. Growth rate, productivity, and chl a content of strain A8 exposed to incandescent light were recorded as 0.092 ± 0.010 day?1, 0.019 ± 0.008 g L?1 day?1, and 15.10 ± 1.40 mg L?1, which decreased to 0.086 ± 0.006 day?1, 0.012 ± 0.004 g L?1 day?1, and 10.06 ± 1.59 mg L?1, respectively, under fluorescent light. The stable current density of bioelectrochemical systems inculcated with strain A8 under incandescent and fluorescent lamps were 249.76 and 158.41 mA m?2 at ?0.4 V vs. Ag/AgCl, coupling with dissolved oxygen within biofilm decreasing from 15.91 to 10.80 mg L?1. This work demonstrated that illuminating microalgae under an incandescent lamp can improve biomass production and electrogenic capabilities. |
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| Keywords: | Bioelectrochemical systems biofilms dissolved oxygen light source microalgae |
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