关键词: 废水, 减压, 氨

Abstract: The effects of test conditions on the efficiency of ammonia removal from wastewater with high ammonia content were studied by vacuum desorption method. Results showed that the pH value of wastewater and the temperature of jacket heating water were the main influential factors. When treating wastewater with a NH3 content of 5 000 mg/L using a vacuum column packed with 4 mm θ stainless steel packing, under the conditions of a wastewater pH value of 12, a jacket-water temperature of 50℃, a vacuum degree of 7.9 kPa, a feed rate of 20 mL/min, the once-through removal rate of ammonia reached 87.2% and an average ammonia removal rate of 86.2% was obtained from continuous experiments.

Key words: waste water, vacuum, ammonia