NDLI: Characterization of the flocculating agent from the spontaneously flocculating microalga Chlorella vulgaris JSC-7.

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Characterization of the flocculating agent from the spontaneously flocculating microalga Chlorella vulgaris JSC-7.

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Characterization of the flocculating agent from the spontaneously flocculating microalga Chlorella vulgaris JSC-7.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Alam, Md Asraful Wan, Chun Guo, Suo-Lian Zhao, Xin-Qing Huang, Zih-You Yang, Yu-Liang Chang, Jo-Shu Bai, Feng-Wu
Description	Country affiliation: China Author Affiliation: Alam MA ( School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China.); Wan C ( School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China.); Guo SL ( School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China.); Zhao XQ ( School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China. Electronic address: xqzhao@dlut.edu.cn.); Huang ZY ( Institute of Biochemical Sciences, National Taiwan University, Taipei 106, Taiwan.); Yang YL ( Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan.); Chang JS ( Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan.); Bai FW ( School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China.)
Abstract	High cost of biomass recovery is one of the bottlenecks for developing cost-effective processes with microalgae, particularly for the production of biofuels and bio-based chemicals through biorefinery, and microalgal biomass recovery through cell flocculation is a promising strategy. Some microalgae are naturally flocculated whose cells can be harvested by simple sedimentation. However, studies on the flocculating agents synthesized by microalgae cells are still very limited. In this work, the cell flocculation of a spontaneously flocculating microalga Chlorella vulgaris JSC-7 was studied, and the flocculating agent was identified to be cell wall polysaccharides whose crude extract supplemented at low dosage of 0.5 mg/L initiated the more than 80% flocculating rate of freely suspended microalgae C. vulgaris CNW11 and Scenedesmus obliquus FSP. Fourier transform infrared (FTIR) analysis revealed a characteristic absorption band at 1238 cm(-1), which might arise from PO asymmetric stretching vibration of [Formula: see text] phosphodiester. The unique cell wall-associated polysaccharide with molecular weight of 9.86×10(3) g/mol, and the monomers consist of glucose, mannose and galactose with a molecular ratio of 5:5:2. This is the first time to our knowledge that the flocculating agent from C. vulgaris has been characterized, which could provide basis for understanding the cell flocculation of microalgae and breeding of novel flocculating microalgae for cost-effective biomass harvest.
File Format	HTM / HTML
ISSN	13891723
Issue Number	1
Volume Number	118
e-ISSN	13474421
Journal	Journal of Bioscience and Bioengineering
Language	English
Publisher	Elsevier
Publisher Date	2014-07-01
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biomedical Engineering Discipline Microbiology Chlorella Vulgaris Chemistry Polysaccharides Biomass Cell Wall Ultrastructure Flocculation Microalgae Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Bioengineering Applied Microbiology and Biotechnology Biotechnology

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