A bioelectrochemical system (BES)-based trickling filter (TF) reactor was utilized for wastewater treatment. At a COD load of 1.0 g-COD/L/day, effluent chemical oxygen demand (COD) and total nitrogen (TN) were 115 and 108 mg/L, respectively, which were allowed for discharge. Superior performance was achieved at 0.5 g-COD/L/day with a circulation rate of 8 L/h, and both COD and TN removal were >98%. Coulombic efficiency was 11% at 1.0 g-COD/L/day and at most 16% at 0.5 g-COD/L/day. COD removal decreased when the BES was removed, demonstrating that BES improved COD removal capability. In anodic biofilms, exoelectrogenic, facultative, nitrifying, and sulfate-reducing bacteria could coexist. Geobacter for current generation grew inside the biofilm, and bacteria in the middle and outer layers consumed oxygen and degraded organic matter and nitrogen. This BES-based TF reactor may be used for efficient and cost-effective COD and TN removal at high loads without excess sludge removal.

基于生物电化学系统（BES）的滴滤池（TF）反应器用于废水处理。在1.0 g-COD / L /天的COD负荷下，废水的化学需氧量（COD）和总氮（TN）分别为115和108 mg / L，可以排放。在0.5 g-COD / L /天，循环速率为8 L / h的情况下实现了卓越的性能，并且COD和TN去除率均> 98％。在1.0 g-COD / L /天时，库仑效率为11％，在0.5 g-COD / L /天时，最多为16％。去除BES时，COD去除率降低，表明BES改善了COD去除能力。在阳极生物膜中，外生电细菌，兼性细菌，硝化细菌和硫酸盐还原细菌可以共存。地细菌在生物膜内部生长的电流很大，中层和外层的细菌消耗了氧气，并降解了有机质和氮。这种基于BES的TF反应器可用于在高负荷下高效且经济高效地去除COD和TN，而无需去除过多的污泥。