气流与第三方物质交互解吸高浓度氨氮废水的研究  

Air Stripping of Ammonia from High-concentration Ammonia Wastewater with Surfactant as Third Component

作　　者：龚凡杰[1] 王光华[1] 孙明东 鲁云洲[1] 荣先萍[1] 刘铁军[1] 

机构地区：[1]武汉科技大学化学工程与技术学院,湖北武汉430081

出　　处：《环境科学与技术》2012年第12期76-81,共6页Environmental Science & Technology

基　　金：国家自然科学基金资助项目(20976141);湖北省高校重大产学研项目

摘　　要：利用填料塔作为吹脱解吸设备,结合表面活性剂增强传质的特点,选取表面活性剂作为第三方物质,以空气作为气流吹脱解吸废水中的高浓度氨氮。实验研究了废水温度T、pH值、气液比n、表面活性剂种类和投加量ρ等条件变化对氨氮解吸效率η的影响。结果表明:加入表面活性剂X后,氨氮脱除效率提高2%;影响解吸效率因素的主次顺序为pH>T>n>ρ;最佳操作条件为T=80℃、pH=11.0、ρ=15 mg/L、n=650:1。在最佳的操作条件下,处理氨氮含量为2 159.0 mg/L和3 680.5 mg/L的废水时,解吸效率分别达到95.28%和94.69%,即废水最终的氨氮浓度为102.0 mg/L和195.5 mg/L,低于废水后续生化处理进水指标中对氨氮含量的要求。An experiment was conducted on a bench-scale packed tower used as an air stripper, with a kind of surfactant added as the third component, to remove ammonia from a stream of high-concentration ammonia wastewater. Parameters, including pH, temperature, n（volume ratio of air to liquid）and p（dose of the surfactant added）, were studied about their influences on stripping efficiency, and the result showed addition of the surfactant could increase ammonia removal efficiency by 2%. Eventually, the experiment led to the optimum condition for ammonia stripping in terms of temperature and pH, with the ammonia concentration after treatment as low as that needed for the consequent secondary biological treatment of wastewater.

关 键 词：氨氮解吸 空气吹脱 填料塔 表面活性剂 氨氮废水 

分 类 号：X703.1[环境科学与工程—环境工程]