中国炼油与石油化工 ›› 2012, Vol. 14 ›› Issue (3): 96-101.

• Environment Protection • 上一篇    

超重力强化臭氧降解含硝基苯废水

焦纬洲,刘有智,邵凡,刘文丽,李静   

  1. 中北大学
  • 收稿日期:2012-03-19 修回日期:2012-04-23 出版日期:2012-09-30 发布日期:2012-10-22
  • 通讯作者: 焦纬洲 E-mail:jwz0306@126.com
  • 基金资助:
    国家自然科学基金;太原市科技发展计划

Degradation of wastewater containing nitrobenzene by high gravity enhanced ozone oxidation

  • Received:2012-03-19 Revised:2012-04-23 Online:2012-09-30 Published:2012-10-22

摘要: 本文研究了超重力-超声波/臭氧/电解联合技术处理含硝基苯废水。主要考察了pH值、超重力因子、液体流量、电流密度等参数对含硝基苯和COD去除率的影响规律,确定了最佳工艺条件:超重力因子100、初始pH值11、液体流量为100L/h和电流20 mA/cm2,当处理时间为180min时,该废水的硝基化合物降解率可达99%,COD去除率为80%以上,生化系数BOD/COD达到0.64,可以满足生化法进行后续处理。与传统曝气臭氧反应设备相比,旋转填料床的高效传质特性可以提高臭氧的氧化效率,节约臭氧的消耗量。

关键词: 超重力, 硝基苯, 超声波, 电解, 臭氧

Abstract: High gravity technology and ozone/ultrasonic/ electrochemistry were applied jointly in the pretreatment of wastewater containing nitrobenzene. Effect of pH value, high gravity factor, liquid flow-rate and electric current density on removal rates of COD and nitrobenzene compounds were investigated. Experimental results indicated that under the conditions of high gravity factor of 100, electric current density 20 mA/cm2, liquid flow-rate 100L/h, pH value 11 and reactive time 180min, the the removal efficiency of wastewater containing nitrobenzene, COD, BOD/COD separately reach 99%, 80% and 0.64, the subsequent treatment can be reached by general biochemical processing. Compared with conventional O3 contactors, a rotating packed bed could be used to increase the efficiency of the ozone oxidative treatment of dye wastewater, due to its high mass transfer characteristics.

Key words: high gravity, nitrobenzene, ultrasonic , electrochemistry, ozone