Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain

Fang Liang; Xiaobin Wen; Liming Luo; Yahong Geng; Yeguang Li

doi:10.1007/s00343-015-4130-x

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Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain

OriginalPaper | Updated：2023-05-16

- Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain
- Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain
- 海洋湖沼学报（英文） 2014年32卷第6期页码：1288-1296
- Affiliations：
  
  1. Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical Garden Chinese Academy of Sciences
  2. Institute of Bioengineering Zhengzhou Normal University
  3. University of Chinese Academy of Sciences
  4. Department of Pathology and Immunology Baylor College of Medicine
- Author bio：
- Funds：
  
  Supported by the National Natural Science Foundation of China (No. CNSF31272680) and the National High Technology Research and Development Program of China (No. 2013AA065805)
- DOI：10.1007/s00343-015-4130-x
  中图分类号：
- 网络首发：2014-10-30，
  
  纸质出版：2014
- Accepted：
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Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain[J]. 海洋湖沼学报（英文）, 2014,32(6):1288-1296.

Liang, F., Wen, X., Luo, L. et al. Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain., Chin. J. Ocean. Limnol. 32, 1288–1296 (2014). https://doi.org/10.1007/s00343-015-4130-x
Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain[J]. 海洋湖沼学报（英文）, 2014,32(6):1288-1296. DOI： 10.1007/s00343-015-4130-x.

Liang, F., Wen, X., Luo, L. et al. Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp. strain., Chin. J. Ocean. Limnol. 32, 1288–1296 (2014). https://doi.org/10.1007/s00343-015-4130-x DOI：

摘要

Abstract

SO2 is very rapidly hydrated to sulfurous acid in water solution at pH value above 6.0

whereby sulfite is yielded from the disassociation of protons. We aimed to improve the sulfite transformation efficiency and provide a basis for the direct utilization of SO2 from flue gas by a microalgal suspension. Chlorella sp. XQ-20044 was cultured in a medium with 20 mmol/L sodium sulfite under different physicochemical conditions. Under light conditions

sulfite concentration in the algal suspension reduced linearly over time

and was completely converted into sulfate within 8 h. The highest sulfite transformation rate (3.25 mmol/(L·h)) was obtained under the following conditions: 35°C

light intensity of 300 μmol/(m2·s)

NaHCO3 concentration of 6 g/L

initial cell density (OD540) of 0.8 and pH of 9–10. There was a positive correlation between sulfite transformation rate and the growth of Chlorella

with the conditions favorable to algal growth giving better sulfite transformation. Although oxygen in the air plays a role in the transformation of SO2− 3 to SO2− 4

the transformation is mainly dependent on the metabolic activity of algal cells. Chlorella sp. XQ-20044 is capable of tolerating high sulfite concentration

and can utilize sulfite as the sole sulfur source for maintaining healthy growth. We found that sulfite ≤20 mmol/L had no obvious effect on the total lipid content and fatty acid profiles of the algae. Thus

the results suggest it is feasible to use flue gas for the mass production of feedstock for biodiesel using Chlorella sp. XQ-20044

without preliminary removal of SO2

assuming there is adequate control of the pH.

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references

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