Acidic and hydrogen peroxide treatment of polyaluminum chloride (PACL) sludge from water treatment

J. H. Kwon, K. Y. Park, J. H. Park, S. H. Lee, K. H. Ahn

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The water treatment sludge including coagulants cannot be easily removed by conventional dewatering methods. The possibility of hydrogen peroxide (H2O2) oxidation as a pretreatment to enhance the dewaterability of polyaluminum chloride (PACI) sludge from water works was investigated. H2O2 treatment alone was not effective but H2O2 treatment under acidic condition significantly reduced both the cake water content and specific resistance to filtration (SRF), indicating the enhancement of dewaterability and filterability. The filterability after acid/H2O2 treatment was comparable to polymer conditioning and even more dewatered cake than polymer conditioning was produced. By H2O2 combined with sulfuric acid (H2SO4), leached iron caused Fenton's reaction, which showed a potential to significantly reduce the amount of solids mass and to produce more compact cake with higher filterability.

Original languageEnglish
Pages (from-to)99-105
Number of pages7
JournalWater Science and Technology
Issue number9
Publication statusPublished - 2004


  • Acid treatment
  • Dewatering
  • Fenton reaction
  • HO
  • PACI sludge

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology


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