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5097316 
Journal Article 
Ammonia removal by magnesium ammonium phosphate precipitation in industrial wastewaters 
Tunay, O; Kabdasli, I; Orhon, D; Kolcak, S 
1997 
Water Science and Technology
ISSN: 0273-1223
EISSN: 1996-9732 
36 
2-3 
225-228 
English 
BIOSIS COPYRIGHT: BIOL ABS. In this study, the theoretical basis and limitations of magnesium ammonium phosphate (MAP) precipitation are investigated and experimentally tested for leather tanning industry. The MAP precipitation is applied to leather tanning wastewaters for both segregated flows containing high ammonia concentrations and combined flows. Segregated flow treatment on smaller volumes of wastewater provided an ammonia concentration of down to 150 mg l-1 NH3-N. The resulting ammonia concentration of MAP precipitation on combined wastewater is at the level of domestic wastewater which eliminates the need of further nitrogen removal in the biological treatment and provides an effluent quality acceptable for the public sewer.