Abstract: The simulated NO₃^--N polluted groundwater has been treated by two types of three-dimensional biofilm electrode reactors(3D-BER),plate reactor and central reactor,and the difference of the influences of four kinds of factors,including HRT,current,initial NO₃^--N concentration and pH on the denitrification effects of two kinds of reactors investigated. The results show that appropriate HRT for both 3D-BERs is 12 h,and the optimal electric current for plate and central reactors is in the same range of 40-50 mA,and the corresponding maximum NO₃^--N removing rates are 82.67% and 71.89% respectively. The ideal NO₃^--N concentrations in influent of plate and central 3D-BERs are 35-55 mg/L and 20-35 mg/L respectively,in which the plate 3D-BER reactor has higher endurance capacity for NO₃^--N loading in influent,while the central 3D-BER has higher buffering capacity for pH in influent,due to its better mixing condition of products coming from anode and cathode.

Key words: three-dimensional electrode biofilm reactor, plate reactor, central reactor, nitrate nitrogen, groundwater

摘要： 采用平板式、中心式2种构型的三维生物膜电极反应器（3D-BER）对模拟的污染地下水中的NO₃^--N进行处理，研究了水力停留时间（HRT）、电流、进水NO₃^--N浓度和pH这4种影响因素对2种反应器脱氮效果的影响。结果表明：平板式、中心式3D-BER反应器适宜的HRT均为12 h，最佳的电流范围均为40~50 mA，对应的最大NO₃^--N去除率分别为82.67%、71.89%，理想的进水NO₃^--N分别为35~55、20~35 mg/L，平板式3D-BER反应器对进水NO₃^--N负荷具有更高的承受能力，中心式3D-BER反应器由于具有较好的阴极和阳极产物混合条件，对进水pH具有更强的缓冲能力。

关键词: 三维电极生物膜反应器(3D-BER), 平板式反应器, 中心式反应器, NO₃^--N, 地下水

CLC Number: 

• X703