The Effect of HRT and C/Ns on the Nitrate Removal Using an Intensified Biofilm-electrode Reactor

摘要：

　　An intensified biofilm-electrode reactor was developed for treatment of nitrate contaminated groundwater.Continual flow cultural method was adopted in this experiment.Nitrate removal efficiency,nitrite accumulation and pH in the treated water were mainly investigated at different hydraulic retention time (HRT) levels and C/Ns when DO and applied currents were steady.Based on the experimental results,the following conclusions could be made:when the influent NO3--N concentration was 50 mg · L-1,C∶ N =2.5∶1,HRT =8 h,the effluent average concentration of NO3--N was 0.06 mg · L-1,nitrite and NH3-N were not detected.When HRT =8 h and C∶N =1∶1,the effluent average concentration of NO3--N was 0.O1 mg · L-1,NO2--N was lower than 0.02 mg · L-1.But when C∶N =0.75∶1,the effluent average concentration of NO3--N was about 2.93 mg · L-1,the NO3--N removal efficiency was 94.3%.

关键词： Nitrate Electrode-biofilm reactor Denitrification HRT C/N

作者: Ying-xin ZHAO Chuan-ping FENG Qing-hong WANG Chun-bo HAO

作者单位: China University of Geosciences,Beijing 100083,P.R.China

会议类型: 国际会议

会议名称: The 2nd China-Japan Graduate Student Forum -- Life, Environment and Energy (第二届中日研究生论坛--生命,环境与能源)

会议地点: 北京

会议语种:英文

页码: 400-405

在线出版日期: 2009-09-24（万方平台首次上网日期，不代表论文的发表时间）