State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China.
Bioresour Technol. 2016 Dec;222:317-325. doi: 10.1016/j.biortech.2016.09.090. Epub 2016 Sep 23.
A tide-type biocathode microbial electrochemical system (TBMES) employing intermittent air accessible method was constructed for simultaneous carbon and nitrogen removal. The nitrification and denitrification processes occurred in cathode chamber were enhanced by raising frequency of catholyte feeding-draining process and lowering external resistance. At external resistance of 5Ω and frequency of 8cph, the TBMES removed 99.3±0.3% of COD and 57.7±1.1% of total nitrogen when treating synthetic medium with COD/N ratio of 3.0, concomitantly, a maximum power density of 10.6Wm was achieved. Comparable performances were obtained for reject water treatment with a relatively lower COD/N ratio of 2.5, which were 88.6±1.3%, 53.2±3.8% and 8.9±0.2Wm for COD removal, total nitrogen removal and maximum power density. The feeding-draining process consumed 14.3% of the total energy produced, and thus obviated energy-intensive aeration and achieved net energy output.
采用间歇式空气可接触方法构建了一种潮汐式生物阴极微生物电化学系统（TBMES），用于同时去除碳和氮。通过提高阴极电解液的进料-排水过程的频率和降低外部电阻，增强了阴极室内的硝化和反硝化过程。在外电阻为 5Ω 和频率为 8cph 的条件下，当用 COD/N 比为 3.0 的合成培养基处理时，TBMES 去除了 99.3±0.3%的 COD 和 57.7±1.1%的总氮，同时实现了 10.6Wm 的最大功率密度。对于 COD/N 比相对较低的 2.5 的废水处理，也获得了相当的性能，COD 去除率、总氮去除率和最大功率密度分别为 88.6±1.3%、53.2±3.8%和 8.9±0.2Wm。进料-排水过程消耗了总能量的 14.3%，从而避免了能源密集型曝气并实现了净能量输出。
