Assessment of magnesium ammonium phosphate precipitation for the treatment of leather tanning industry wastewaters

Magnesium ammonium phosphate (MAP) precipitation has a potential for ammonium removal from industrial wastewaters. Application basis of this recent method of treatment has not been fully determined. In this study application of MAP precipitation to leather tanning wastewaters has been experimentally...

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Bibliographic Details
Published in:Water science and technology 2002-01, Vol.46 (4-5), p.231-239
Main Authors: KABDASLI, I, TONAY, O, CETIN, M. S, ÖLMEZ, T
Format: Article
Language:English
Subjects:
Ammonium
Ammonium compounds
Applied sciences
Biological treatment
Chemical Precipitation
Electrolytes
Exact sciences and technology
Hemostatics - chemistry
Hydrogen-Ion Concentration
Industrial Waste
Industrial wastewater
Industrial wastewaters
Leather
Magnesium
Magnesium Compounds - chemistry
Mineral nutrients
Phosphates
Phosphates - chemistry
Pollution
Polyelectrolytes
Precipitation
Quaternary Ammonium Compounds - isolation & purification
Removal
Settling
Struvite
Tanning
Tanning industry
Waste Disposal, Fluid - methods
Wastewater
Wastewater treatment
Wastewaters
Water treatment and pollution
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Summary:Magnesium ammonium phosphate (MAP) precipitation has a potential for ammonium removal from industrial wastewaters. Application basis of this recent method of treatment has not been fully determined. In this study application of MAP precipitation to leather tanning wastewaters has been experimentally evaluated. Five alternative places of MAP precipitation in leather tanning wastewater treatment scheme tested were; instead of plain settling, after plain settling, after polyelectrolyte added plain settling, within the chemical precipitation and after biological treatment. Among these alternatives MAP application instead of plain settling and within the chemical precipitation were found to be most favourable and efficient by reducing the nitrogen load to the level of nutrient requirement in the biological stage. pH 9.0-9.5 and stoichiometric magnesium and phosphate doses were determined to be optimum conditions for MAP precipitation.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2002.0594