Study on the Removal of NH3-N from the Ammonia Water in AS Process Using Fine Chemicals

The purpose of this study was to choose a fine chemical to efficiently remove ammonia nitrogen from the ammonia water in AS Process, which provides a new available approach to treat coking wastewater. The experiment adopted "Air Stripping and Adsorption" to remove ammonia nitrogen from the ammonia water, and studied the reaction temperature T, pH, the time of stripping t, the dosage of the fine chemical, and so on. The best condition of the experiment was: T = 90degC, t = 90 min, Q = 4 L/min, M = 16 mg/L, pH = 12. In this condition the removing rate of ammonia nitrogen could reach 99.31 percent. The effluent ammonia nitrogen concentration was about 79 mg/L, which obtained a satisfied result.