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Enzyme-Assisted Extraction of Oil from Wet Microalgae Scenedesmus sp. G4

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  • Shuhao Huo

    (School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
    Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

  • Zhongming Wang

    (Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

  • Fengjie Cui

    (School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)

  • Bin Zou

    (School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)

  • Pengxiang Zhao

    (Beijing Biomass Energy Technology Center, State Grid Energy Conservation Service Ltd., Beijing 100053, China)

  • Zhenhong Yuan

    (Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China)

Abstract

The enzyme-assisted aqueous extraction of oil from wet microalgae was employed to avoid the energy consumption of a dewatering process. In this paper, oil-rich microalgae Scenedesmus sp. G4 was hydrolyzed by enzyme mixtures for oil extraction. The results showed that the algae concentration had the greatest influence on yield of extracted oil, and the temperature and the ratio of enzyme mixtures affected the results as follows: the maximum yield of oil extracted from Scenedesmus sp. G4 reached 86.1% under optimal conditions with an algae concentration at 2.5 g/L, temperature 30/50 °C, pH 3.5/4.5 and a cellulase:pectinase:hemicellulase ratio of 1:1:1 or 1:2:1 (w/w/w). The results also indicated that the enzyme mixtures had a significant impact on the integrity of microalgae cells and the crystallization index increased from 30.7% to around 36.0% after enzymatic hydrolysis treatment. The cell wall of Scenedesmus sp. G4 has a high content of cellulose Iα and low crystallization, which is beneficial to the oil extraction by the enzyme-assisted hydrolysis method.

Suggested Citation

  • Shuhao Huo & Zhongming Wang & Fengjie Cui & Bin Zou & Pengxiang Zhao & Zhenhong Yuan, 2015. "Enzyme-Assisted Extraction of Oil from Wet Microalgae Scenedesmus sp. G4," Energies, MDPI, vol. 8(8), pages 1-10, August.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:8:p:8165-8174:d:53731
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    References listed on IDEAS

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    1. Shuhao Huo & Renjie Dong & Zhongming Wang & Changle Pang & Zhenhong Yuan & Shunni Zhu & Li Chen, 2011. "Available Resources for Algal Biofuel Development in China," Energies, MDPI, vol. 4(9), pages 1-15, August.
    2. Daroch, Maurycy & Geng, Shu & Wang, Guangyi, 2013. "Recent advances in liquid biofuel production from algal feedstocks," Applied Energy, Elsevier, vol. 102(C), pages 1371-1381.
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    Cited by:

    1. Dong, Tao & Knoshaug, Eric P. & Pienkos, Philip T. & Laurens, Lieve M.L., 2016. "Lipid recovery from wet oleaginous microbial biomass for biofuel production: A critical review," Applied Energy, Elsevier, vol. 177(C), pages 879-895.
    2. Zhang, Yi & Kong, Xiaoying & Wang, Zhongming & Sun, Yongming & Zhu, Shunni & Li, Lianhua & Lv, Pengmei, 2018. "Optimization of enzymatic hydrolysis for effective lipid extraction from microalgae Scenedesmus sp," Renewable Energy, Elsevier, vol. 125(C), pages 1049-1057.

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