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Integrated lipid production, CO2 fixation, and removal of SO2 and NO from simulated flue gas by oleaginous Chlorella pyrenoidosa

  • Kui Du
  • Xiaobin Wen
  • Zhongjie Wang
  • Fang Liang
  • Liming Luo
  • Xinan Peng
  • Yan Xu
  • Yahong Geng
  • Yeguang LiEmail author
Research Article
  • 52 Downloads

Abstract

CO2, SO2, and NO are the main components of flue gas and can cause serious environmental issues. Utilization of these compounds in oleaginous microalgae cultivation not only could reduce air pollution but could also produce feedstock for biodiesel production. However, the continuous input of SO2 and NO inhibits microalgal growth. In this study, the toxicity of simulated flue gas (15% CO2, 0.03% SO2, and 0.03% NO, balanced with N2) was reduced through automatic pH feedback control. Integrated lipid production and CO2 fixation with the removal of SO2 and NO was achieved. Using this technique, a lipid content of 38.0% DW was achieved in Chlorella pyrenoidosa XQ-20044. The lipid composition and fatty acid profile indicated that lipid production by C. pyrenoidosa XQ-20044 cultured with flue gas is suitable as a biodiesel feedstock; 81.2% of the total lipids were neutral lipids and 99.5% of the total fatty acids were C16 and C18. The ratio of saturated fatty acids to monounsaturated fatty acids in the microalgal lipid content was 74.5%. In addition, CO2, SO2, and NO from the simulated flue gas were fixed and converted to biomass and lipids with a removal efficiency of 95.9%, 100%, and 84.2%, respectively. Furthermore, the utilization efficiencies of CO2, SO2, and NO were equal to or very close to their removal efficiencies. These results provide a novel strategy for combining biodiesel production with biofixation of flue gas.

Keywords

Microalgae Biodiesel CO2 biofixation SO2 removal NO removal 

Notes

Funding

This work was funded by the National Natural Science Foundation of China (31272680) and the Ministry of Science and Technology of China (2013AA065805, 2012FY112900). This work was performed in Wuhan Botanical Garden, Chinese Academy of Sciences.

Compliance with ethical standards

Conflict of interest

The authors declared that they have no conflict of interest.

Supplementary material

11356_2019_4983_MOESM1_ESM.pdf (5 mb)
ESM 1 (PDF 5111 kb)
11356_2019_4983_MOESM2_ESM.pdf (4.9 mb)
ESM 2 (PDF 5000 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Kui Du
    • 1
    • 2
  • Xiaobin Wen
    • 1
  • Zhongjie Wang
    • 1
  • Fang Liang
    • 1
    • 3
  • Liming Luo
    • 1
    • 4
  • Xinan Peng
    • 1
    • 5
  • Yan Xu
    • 1
  • Yahong Geng
    • 1
  • Yeguang Li
    • 1
    Email author
  1. 1.Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical GardenChinese Academy of SciencesWuhanPeople’s Republic of China
  2. 2.Sichuan Provincial Academy of Natural Resource SciencesChengduPeople’s Republic of China
  3. 3.Institute of BioengineeringZhengzhou Normal UniversityZhengzhouPeople’s Republic of China
  4. 4.Department of Pathology and ImmunologyBaylor College of MedicineHoustonUSA
  5. 5.College of Information EngineeringHenan University of Animal Husbandry and EconomyZhengzhouPeople’s Republic of China

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