臭氧氧化氨氮废水的实验研究

Experimental Study on the Oxidation of Ammonia Nitrogen Wastewater by Ozone

氨氮废水对人体和环境有极大的危害,排放前需要降解到一定的浓度。本文采用撞击流技术使氨氮废水和氧化剂臭氧在亚微米级湿式状态下相向碰撞而发生氧化反应,研究降解氨氮的效果。通过测量不同臭氧流量、不同反应时间、不同氨氮初始浓度下的降解率,发现臭氧流量越大、反应时间越长、初始浓度越高,降解率越高。撞击流的作用使氨氮废水和臭氧气流的混合物处在亚微米级的颗粒状态下发生更充分的接触和反应。当臭氧流量为4 L/min、反应时间为60分钟、氨氮初始浓度为60 mg/L时,氨氮降解率为16.52%。

Ammonia nitrogen wastewater is very harmful to human body and environment, and needs to be degraded to a certain concentration before discharge. In this paper, the effect of ammonia nitrogen degradation by ozone was studied by the impinging stream technology, which was used to make ammonia nitrogen wastewater and oxidant ozone collide with each other in a submicron wet state to produce oxidation reaction. By measuring the degradation rate under different ozone flow rate, different reaction time and different initial concentration of ammonia nitrogen, it was found that the greater the ozone flow rate, the longer the reaction time and the higher the initial concentration, the higher the degradation rate. The impinging stream made the mixture of ammonia nitrogen wastewater and ozone gas contact and react in the submicron particle state, which became more fully. When the ozone flow rate was set at 4 L/min, the reaction time was 60 minutes, and the initial concentration of ammonia nitrogen was 60 mg/L, the ammonia nitrogen degradation rate was 16.52%.