Assessment of source-based nitrogen removal alternatives in leather tanning industry wastewater.
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.
Istanbul Technical University, Environmental Engineering Department, ITU, Inşaat Fakültesi, Ayazağa Kampüsü, 80626, Maslak, Istanbul, Turkey.
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Zengin
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Olmez
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Doğruel
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Kabdaşli
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Tünay
D000818:Animals; D002417:Cattle; D011232:Chemical Precipitation; D006490:Hemostatics / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D017616:Magnesium Compounds / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry* / Q000302:isolation & purification; D010710:Phosphates / Q000737:chemistry; D012867:Skin; D000069877:Struvite; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D006490:Hemostatics; D007220:Industrial Waste; D017616:Magnesium Compounds; D010710:Phosphates; D000069877:Struvite; D009584:Nitrogen