Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp strain
文献类型：期刊论文
| 作者 | Liang Fang; Geng Yahong; Wen Xiaobin; Li Yeguang; Luo Liming |
| 刊名 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
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| 出版日期 | 2014 |
| 英文摘要 | 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 effi ciency and provide a basis for the direct utilization of SO2 from fl ue 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 degrees C, light intensity of 300 mu mol/(m(2).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 SO32- to SO42-, 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 profi les of the algae. Thus, the results suggest it is feasible to use fl ue 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. |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/362]  |
| 专题 | 中国科学院武汉植物园 |
| 推荐引用方式 GB/T 7714 | Liang Fang,Geng Yahong,Wen Xiaobin,et al. Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp strain[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2014. |
| APA | Liang Fang,Geng Yahong,Wen Xiaobin,Li Yeguang,&Luo Liming.(2014).Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp strain.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY. |
| MLA | Liang Fang,et al."Physicochemical effects on sulfite transformation in a lipid-rich Chlorella sp strain".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2014). |
入库方式： OAI收割
来源：武汉植物园
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