With initial pyridine concentration of 200 mg/L and SB1317 voltage across the AER was fixed at 700 mV by adjusting the variable resistor in the circuit, pyridine was gradually removed and the degradation efficiency reached as high as 82.9% after 360 min operation (Fig. 3), showing advantage to foregoing pyridine degradation experiments. For example, only about half pyridine with initial concentration of 200 mg/L was degraded by Rhodococcus strain after 10 h , while 14 h was required to remove 90% of pyridine with initial concentration of 98.27 mg/L and addition of 146.72 mM H2O2 . Promising results were also obtained from MO degradation in the proposed system as 90.4% of MO was removed after 360 min operation with initial concentration of 50 mg/L, which was comparable to previous study  and showed advantage to existing decolorization studies conducted in MFCs ,  and . These results implied lymphatic circulation nitrogen-containing organic compounds could be electrochemically degraded effectively with MFCs as renewable power sources.