In this study, the electrolytic sequencing batch reactor (ESBR) with different current densities was constructed to investigate the nitrogen removal performance and rapid start-up of anaerobic ammonia oxidation (anammox) process. The changes of total nitrogen removal rate (TNRR), specific anammox activity (SAA) and nitrogen concentration under different current densities were analyzed, and then the effect of the optimal current density on the start-up of anammox in ESBR was explored. The results showed that ammonium nitrogen removal efficiency (92.7%), nitrite nitrogen removal efficiency (15.5%) and total nitrogen removal efficiency (28.1%) were obtained with the TNRR and SAA were 0.0118 g N L⁻¹ d⁻¹ and 0.0050 g N (g Vss d)⁻¹, respectively under the optimal conditions (i.e., current density = 0.10 mA cm⁻², temperature = 36 °C and pH = 7.6). In addition, the stoichiometric ratio indicated that anammox was initiated successfully for 91 days in ESBR with the current density of 0.10 mA cm⁻², which was shortened by 10 days compared with the conventional SBR without current density. These results suggest that an array of rapid start-up processes of anammox can be developed through applying current density to stimulate the activity of anammox bacteria (AnAOB).

本研究构建了不同电流密度的电解序批式反应器（ESBR），研究了厌氧氨氧化（anammox）工艺的脱氮性能和快速启动。分析了不同电流密度下总脱氮率（TNRR）、厌氧氨氧化比活性（SAA）和氮浓度的变化，探讨了最佳电流密度对ESBR中厌氧氨氧化启动的影响。^{结果表明，当TNRR和SAA分别为0.0118 g NL -1} d ^-1和0.0050 g N时，铵态氮去除率（92.7%）、亚硝酸盐氮去除率（15.5%）和总氮去除率（28.1%）(g Vss d) ^-1，分别在最佳条件下（即电流密度 = 0.10 mA cm ^-2，温度 = 36 °C 和 pH = 7.6）。此外，化学计量比表明，在电流密度为 0.10 mA cm ^-2的 ESBR 中，厌氧氨氧化成功启动了 91 天，与没有电流密度的常规 SBR 相比缩短了 10 天。这些结果表明，通过施加电流密度来刺激厌氧氨氧化细菌（AnAOB）的活性，可以开发出一系列厌氧氨氧化的快速启动过程。