Nitrate removal from groundwater by a biofilm reactor

摘要：

In this study.a new kind of biofilm reactor was developed using a laboratory-scale experimental apparatus for treatment of nitrate-contaminated groundwater.Nitrate removal efficiency,nitrite accumulation,COD and pH in the treated water were detected under various conditions set by several parameters including hydraulic retention times(HRTs)(24,20,16,12,8,4 and 2 hours),influent nitrate loading(50,100 and 150 N03-N mg/L),pH(5,6,7,8,and 9)and ratio of carbon and molecule nitrogen(C/N=3,2,1.5 and 1.25).The experiment results demonstrated that the optimum reaction parameters were pH=7-7.5,C/N=1.25 and HRT=8h.High-quality effluent water in terms of nitrate,nitrite and COD was obtained when the concentration of N03-N was no more than 100 mg/L under the optimum conditions.

关键词： Nitrate Nitrite Groundwater Biofilm reactor Denitrification

作者: Qinghong WANG Yingxin ZHAO Chuanping FENG

作者单位: Water Resource and environmental engineering,China University of Geoscience,BeiJing 100083,China

会议类型: 国际会议

会议名称: The International Conference on Advances in Chemical Technologies for Water and Wastewater Treatment(2008年化学技术对水及废水处理国际研讨会)

会议地点: 西安

会议语种:英文

页码: 625-631

在线出版日期: 2008-05-15（万方平台首次上网日期，不代表论文的发表时间）