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Enhancement of Lipid Production of Scenedesmus obliquus Cultivated in Municipal Wastewater by Plant Growth Regulator Treatment

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Abstract

Effects of four different plant growth regulators including indole-3-acetic acid (IAA), 1-triacontanol (TRIA), 2,4-dichlorophenoxyacetic acid (2,4-D) and 6-benzylaminopurine (6-BA) on biomass and lipid productivity of microalga Scenedesmus obliquus cultured in municipal wastewater were primarily studied. The results showed that the lipid productivity of S. obliquus was significantly increased by 30.5 and 23.6% after the treatment by IAA and TRIA, respectively. According to the GC analysis of the lipids, the addition of IAA and TRIA could increase the content of monounsaturated fatty acid in S. obliquus, and thus improving the grade of biodiesel. After the addition of IAA and TRIA, the nitrogen content of S. obliquus significantly decreased, while bacterial diversity in wastewater increased, which could enhance the stability of microbial system in the wastewater medium. Meanwhile, significant increase were also found in the abundances of β-Proteobacteria and α-Proteobacteria.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 50978069) and Shenzhen Science and Technology Innovation Project (JCYJ20150529114024234, JCYJ20170307150223308).

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Authors and Affiliations

  1. Shenzhen Engineering Laboratory of Microalgal Bioenergy, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, 518055, China

    Song-Fang Han, Wenbiao Jin, Xu Zhou, Renjie Tu & Hongyi Chen

  2. New Energy Department, School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, China

    Abd El-Fatah Abomohra

  3. Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt

    Abd El-Fatah Abomohra

  4. State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin, 150001, China

    Chuan Chen

  5. Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, 73019, USA

    Shu-hong Gao

  6. School of Engineering and Built Environment & Centre for Clean Environment and Energy & Environmental Futures Research Institute, Griffith University, QLD, Australia

    Qilin Wang

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  1. Song-Fang Han
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  2. Wenbiao Jin
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  3. Abd El-Fatah Abomohra
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  4. Xu Zhou
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Correspondence to Wenbiao Jin or Xu Zhou.

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Han, SF., Jin, W., Abomohra, A.EF. et al. Enhancement of Lipid Production of Scenedesmus obliquus Cultivated in Municipal Wastewater by Plant Growth Regulator Treatment. Waste Biomass Valor 10, 2479–2485 (2019). https://doi.org/10.1007/s12649-018-0314-x

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