Characterization of flocculating agent from the self-flocculating microalga Scenedesmus obliquus AS-6-1 for efficient biomass harvest

Suo Lian Guo, Xin Qing Zhao, Chun Wan, Zih You Huang, Yu Liang Yang, Md Asraful Alam, Shih Hsin Ho, Feng Wu Bai, Jo-Shu Chang

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)

Abstract

In the present work, the extracellular biopolymers from the self-flocculating microalga Scenedesmus obliquus AS-6-1 were studied. It was revealed that the self-flocculation of the microalgal cells was mediated by cell wall-associated polysaccharides with a molecular weight of 127.9. kDa. Sugar compositions analysis indicated that the monomers consist of glucose, mannose, galatose, rhamnose and fructose with the molar ratio of 8:5:3:2:1. Addition of 0.6. mg/L purified flocculating agent resulted in the fast flocculation of freely suspended cells of S. obliquus and Chlorella vulgaris. The flocculating activity is stable between pH 6 and 8 and at 20-60. °C.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalBioresource technology
Volume145
DOIs
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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