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

93 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

All Science Journal Classification (ASJC) codes

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

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