Assessment of source-based nitrogen removal alternatives in leather tanning industry wastewater

G. Zengin*, T. Ölmez, S. Doǧruel, I. Kabdaşli, O. Tünay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Nitrogen is an important parameter of leather tanning wastewaters. Magnesium ammonium phosphate (MAP) precipitation is a chemical treatment alternative for ammonia removal. In this study, a detailed source-based wastewater characterisation of a bovine leather tannery was made and nitrogen speciation as well as other basic pollutant parameter values was evaluated. This evaluation has led to definition of alternatives for source-based MAP treatment. MAP precipitation experiments conducted on these alternatives have yielded over 90% ammonia removal at pH 9.5 and using stoichiometric doses. Among the alternatives tested liming-deliming and bating-washing was found to be the most advantageous providing 71% ammonia removal.

Original languageEnglish
Pages (from-to)205-215
Number of pages11
JournalWater Science and Technology
Issue number12
Publication statusPublished - 2002


  • Bovine leather processing
  • Leather tanning industry
  • Magnesium ammonium phosphate precipitation
  • Nitrogen removal
  • Source-based characterisation


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