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.
Assessment of source-based nitrogen removal alternatives in leather tanning industry wastewater
G. Zengin,, T. Ölmez, S. Doğruel, I. Kabdaşlı, O. Tünay; Assessment of source-based nitrogen removal alternatives in leather tanning industry wastewater. Water Sci Technol 1 June 2002; 45 (12): 205–215. doi: https://doi.org/10.2166/wst.2002.0428
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