Carbon dioxide fixation by Chlorella sp. USTB-01 with a fermentor-helical combined photobioreactor |
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Authors: | Xuan Jia Hai Yan Zijing Wang Huanju He Qianqian Xu Haiou Wang Chunhua Yin and Liqin Liu |
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Institution: | (1) Institute of Biotechnology, Zurich University of Applied Sciences (ZHAW), 8820 W?denswil, Switzerland;(2) Laboratory of Cell Cycles of Algae, Institute of Microbiology of AS CR, 37981 Třeboň, Czech Republic; |
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Abstract: | A promising microalgal strain isolated from fresh water, which can grow both autotrophically on inorganic carbon under lighting
and heterotrophically on organic carbon without lighting, was identified as Chlorella sp. USTB-01 with the phylogenetic analysis based on 18S ribosomal ribonucleic acid (rRNA) gene sequences. In the heterotrophic
batch culture, more than 20.0 g·L−1 of cell dry weight concentration (DWC) of Chlorella sp. USTB-01 was obtained at day 5, and which was used directly to seed the autotrophic culture. A novel fermentor-helical
combined photobioreactor was established and used to cultivate Chlorella sp. USTB-01 for the fixation of carbon dioxide (CO2). It showed that the autotrophic growth of Chlorella sp. USTB-01 in the combined photobioreactor was more effective than that in the fermentor alone and the maximum DWC of 2.5
g·L−1 was obtained at day 6. The highest CO2 fixation of 95% appeared on day 1 in the exponential growth phases of Chlorella sp. USTB-01 and 49.8% protein was found in the harvested microalgal cells. |
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