In this study, the performance of a new design of flow-by fixed bed bio-electrochemical reactor was investigated for cobalt removal from simulated wastewater. The influence of operation parameters such as applied cell potential, initial cobalt concentration, pH of the catholyte, and the mesh size of the cathode on the performance of the bio-electrochemical reactor were investigated. The results showed that the applied cell potential had the largest effect on cobalt removal efficiency. An increased cell potential resulted in an increase in removal efficiency, while an increased initial cobalt concentration led to a decrease in removal efficiency. The results confirmed that using a pH < 3 caused a sharp decrease in removal efficiency while a pH > 7 led to a slightly decrease in removal efficiency. Using a mesh no. > 30 gave a lower removal efficiency. The best operating conditions were a cell potential of 1.8 V, an initial cobalt concentration of 50 ppm, and a pH of 7. Under these conditions with a stack of stainless no. 30 steel mesh as a packed bed cathode, a removal efficiency > 99% was obtained, in which the final cobalt concentration was reduced to < 1 ppm at 100% current efficiency and a low energy consumption of 1.564 kW h/kg cobalt.

在这项研究中，研究了一种新设计的流动固定床生物电化学反应器的性能，该反应器用于从模拟废水中去除钴。研究了操作参数（如施加的电势，钴的初始浓度，阴极电解液的pH值和阴极的筛目大小）对生物电化学反应器性能的影响。结果表明，施加的细胞电势对钴去除效率的影响最大。增加的细胞电势导致去除效率的提高，而增加的初始钴浓度导致去除效率的降低。结果证实，使用pH <3导致去除效率急剧下降，而pH> 7导致去除效率略有下降。使用网号 > 30的去除效率较低。最佳操作条件是电池电势为1.8 V，钴的初始浓度为50 ppm，pH为7。使用30个钢网作为填充床阴极，去除效率> 99％，其中在100％电流效率和1.564 kW h / kg钴的低能耗下，最终钴浓度降低到<1 ppm。