超声波强化空气吹脱脱氨的机理研究  

Studies on mechanism of ammonia removal by air stripping enhanced by ultrasound

作　　者：吴成强[1] 张爱国[1] 陈效[1] 边康玲 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2013年第5期486-489,共4页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(Y5110141)

摘　　要：采用超声波与空气吹脱联合处理实验室模拟含氨废水,探讨了超声强化空气吹脱脱氨过程及作用机理.结果表明,超声波能够明显强化空气吹脱脱氨效率,但是超声强化提升值受反应时间、空气流量、pH值的影响,最佳反应条件为40min,pH 9.4,空气流量600L/h,超声提升值达到23.6%.超声波主要通过提高游离氨的传质系数来强化空气吹脱的作用;吹脱和超声氧化是脱氨的两种作用途径,当pH>8.2时,吹脱是主要作用机制,当pH<8.2时,超声氧化是主要作用机制.Ultrasound and air stripping were synchronously used to treat the wastwater containing ammonia prepared in laboratory. The air stripping process enchanced by ultrasound and its mechanism were studied. It was found that ultrasound can greatly promote ammonia removal during the air stripping, which was influenced by the reaction time, air flux and pH. The optimal promotion value of ammonia removal was 23.6%, obtained at the reacion time of 40 mins, pH 9.4 and air flux of 600 L/h. Ultrasound can accelerate the speed of ammonia＇s mass transfer in liquid phase and then strengthen the removal of ammonia. Striping and ultrasonic oxidation were the two main roles in the collaboration of ultrasound and air stripping. Stripping plays the major role at pH〈8.2, but ultrasonic oxidation plays the major role at pH〈8.2.

关 键 词：氨氮 超声波 吹脱 强化作用 超声氧化 

分 类 号：X703.1[环境科学与工程—环境工程]