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
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
中图分类号:
李金成, 李俊成, 董京洲, 陈泽新, 夏文香. 不同3D-BER反应器去除地下水中NO3--N的研究[J]. 工业水处理, 2018, 38(9): 86-90.
Li Jincheng, Li juncheng, Dong Jingzhou, Chen Zexin, Xia Wenxiang. Research on the removal of nitrate nitrogen from groundwater by different types of three-dimensional biofilm electrode reactors[J]. INDUSTRIAL WATER TREATMENT, 2018, 38(9): 86-90.