Pretreatment requirements for leather tanning industry wastewaters

O. Tunay*, D. Orhon, I. Kabdasli

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

29 Citations (Scopus)

Abstract

In this study, experiments are conducted on leather tanning industry wastewaters to evaluate efficiencies of alternative schemes of physical-chemical treatment with regard to pretreatment standards. Carbonation and protein removal are employed in addition to sulfide oxidation, chromium precipitation, plain sedimentation and chemical precipitation. Two samples are used from two different tanneries processing cattlehide. Results indicate that carbonation and protein removal have little effect on COD. TKN removal in protein precipitation is about 20 %. Plain sedimentation is found to be as efficient as chemical precipitation for all parameters except chromium. However, as the results are evaluated with regard to pretreatment standards chemical precipitation is suggested to be the method of choice to meet the chromium as well as suspended solids and sulfide standards.

Original languageEnglish
Pages (from-to)121-128
Number of pages8
JournalWater Science and Technology
Volume29
Issue number9
DOIs
Publication statusPublished - 1994
EventProceedings of the IAWQ International Specialized Conference on Pretreatment of Industrial Wastewaters - Athens, Greece
Duration: 13 Oct 199315 Oct 1993

Keywords

  • Carbonation of lime liquor
  • Leather tanning industry
  • Physical-chemical treatment
  • Protein removal
  • Tannery wastewater characterization

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