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Performance of bioelectrochemical systems inoculated with Desmodesmus sp. A8 under different light sources

Author:
Wu, Yi-cheng, Xiao, Yong, Wang, Ze-jie, Zhao, Feng
Source:
Bioremediation journal 2016 v.20 no.3 pp. 233-239
ISSN:
1547-6529
Subject:
bioelectrochemistry, biofilm, biomass production, bioremediation, chlorophyll, dissolved oxygen, fluorescent lamps, fluorescent lighting, incandescent lamps, incandescent lighting, microalgae, photosynthesis, silver, silver chloride, stomata
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.
Agid:
5492563