Harvesting of Scenedesmus obliquus FSP-3 using dispersed ozone flotation

Bioresour Technol. 2011 Jan;102(1):82-7. doi: 10.1016/j.biortech.2010.04.083.

Abstract

The Scenedesmus obliquus FSP-3, a species with excellent potential for CO(2) 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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Culture Techniques / methods*
  • Drinking
  • Fluorescence
  • Gases / chemistry
  • Humic Substances / analysis
  • Hydrophobic and Hydrophilic Interactions
  • Organic Chemicals / analysis
  • Ozone / chemistry*
  • Polysaccharides / analysis
  • Proteins / analysis
  • Scenedesmus / physiology*

Substances

  • Gases
  • Humic Substances
  • Organic Chemicals
  • Polysaccharides
  • Proteins
  • Ozone