Ozonation as a means to optimize biological nitrogen removal from landfill leachate

Benedek Plosz, Achim Ried, Antonio Lopez, Helge Liltved, Christian Vogelsang

Research output: Contribution to journalArticlepeer-review

9 Citations (SciVal)


In this study, we investigate factors that can affect nitrification and denitrification in a moving bed biofilm system, treating partly stabilized landfill leachate. The optimization of biological treatment by means of controlled ozonation is additionally evaluated. Results obtained with a laboratory-scale, continuous-flow biofilm system suggest that nitrogen removal can be limited by the low influent biodegradable substrate concentrations, and that autotrophic nitrification can be adversely impacted by the high alkalinity buffer and ammonium/ammonia concentration. Our results suggest an optimum ozone dosage as high as 0.5 g/L O3 can be required to effectively decrease the effluent soluble COD concentration and pH profile in the aerobic reactors, improve the biodegradable COD production from inert compounds, and induce chemical nitrification in the system. The specific cost of ozonation evaluated is 0.36-0.73 euro/m3 with 911 mg/L average effluent soluble COD measured in the biofilm system.

Original languageEnglish
Pages (from-to)313-322
Number of pages10
JournalOzone-Science & Engineering
Issue number5
Publication statusPublished - 2010


  • Combined treatment
  • Costs
  • Denitrification
  • Landfill leachate
  • Moving-bed biofilm system
  • Nitrification
  • Ozone

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Engineering


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