Effect of O3 and O3/H2O2 on algae harvesting using chitosan

R. Pranowo, D. J. Lee, J. C. Liu, J. S. Chang

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We examined the effects of pre-oxidation using ozone (O3) and a combination of O3 and hydrogen peroxide (O3/H 2O2) on algae suspensions and their harvesting. Inactivation of algae cells, release of intracellular organic matter (IOM), mineralization of extracellular organic matter (EOM), and changes in molecular weight distribution of EOM were found after pre-oxidation. Enhanced separation efficiency of turbidity, dissolved organic carbon (DOC), protein, and polysaccharide using chitosan and polyaluminum chloride (PACl) was found after pre-oxidation, especially when algae cells were subject to O3/H 2O2. Chitosan showed higher efficiency than PACl. Judging from the remarkable increase in floc size, it was proposed that released IOM formed complexes with cationic chitosan and resulted in enhanced dual flocculation and facilitated algae separation.

Original languageEnglish
Pages (from-to)1294-1301
Number of pages8
JournalWater Science and Technology
Volume67
Issue number6
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

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