Ammonia Removal from Wastewater by Chemical Precipitation

Ammonia in wastewater can be removed by using chemical precipitants Mg(OH) 2 and H 3PO 4 to form a composite fertilizer MgNH 4PO 4, with the removal ratio of ammonia above 95% under the optimal conditions. The effects of pH value, precipitant constitutions and the initial concentration of ammonia in the wastewater on ammonia removal efficiency are disscussed.