缺氧/好氧电化学膜-生物反应器强化脱氮效果及抗污染性能研究

研究了外加电压下电化学A/O-MBR的污染物去除效果和抗污染性能，分析了抗污染性能提高的原因.结果显示，外加2V电压时系统对COD和总氮的平均去除率分别为89.4%、92.2%，不加电压时COD和总氮的去除率分别为87.6%、77.3%，表明外加电压能够显著提高A/O-MBR的脱氮处理效果；研究同时发现，外加2V电压时，导电膜的平均运行周期为38d，相比不加电压时（平均26d），运行周期有所延长.污染物与导电膜之间的静电排斥作用和H₂O₂的原位清洗作用是系统抗污染性能提升的主要原因.

Enhanced nitrogen removal and anti-fouling behaviours in anoxic/oxic electrochemical membrane bioreactor

The pollutant removal efficiency and anti-fouling behaviours of electrochemical A/O-MBR under external electric field were studied, and the mechanisms for membrane fouling mitigation were analyzed. The results showed that the average removal efficiency of COD and Total Nitrogen (TN) for the A/O-MBR with 2V electric field (EMBR) were 89.4%, 92.2%, and 87.6%, 77.3% for the A/O-MBR without electric field (CMBR), respectively, indicating that the use of external voltage can improve the nitrogen removal of A/O-MBR significantly. It was also found that the average operating cycle for the membrane with 2V electric field was 38days, which was longer than the membrane without voltage (26days on average). The enhanced electrostatic repulsive force between foulants and membrane and the in-situ cleaning of H₂O₂ were the main reasons for anti-fouling ability improvement.