Harvesting of Scenedesmus obliquus FSP-3 using dispersed ozone flotation

Ya Ling Cheng, Yu Chuan Juang, Guan Yu Liao, Pei Wen Tsai, Shih Hsin Ho, Kuei Ling Yeh, Chun Yen Chen, Jo Shu Chang, Jhy Chern Liu, Wen Ming Chen, Duu Jong Lee

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


The Scenedesmus obliquus FSP-3, a species with excellent potential for CO2 capture and lipid production, was harvested using dispersed ozone flotation. While air aeration does not, ozone produces effective solid-liquid separation through flotation. Ozone dose applied for sufficient algal flotation is similar to those used in practical drinking waterworks. The algae removal rate, surface charge, and hydrophobicity of algal cells, and fluorescence characteristics and proteins and polysaccharides contents of algogenic organic matter (AOM) were determined during ozonation. Proteins released from tightly bound AOM are essential to modifying the hydrophobicity of bubble surfaces for easy cell attachment and to forming a top froth layer for collecting floating cells. Humic substances in the suspension scavenge dosed ozone that adversely affects ozone flotation efficiency of algal cells.

Original languageEnglish
Pages (from-to)82-87
Number of pages6
JournalBioresource technology
Issue number1
Publication statusPublished - 2011 Jan

All Science Journal Classification (ASJC) codes

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


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