Attempt of performance upgrade of microbial fuel cells equipped with denitrifying bio-cathodes and applicability to nitrogen removal

对反硝化生物阴极微生物燃料电池在缺氧条件下的基本特性进行了实验研究。在实验结果的基础上，讨论了阴极反应的特点、阴极生物膜中的微生物群落、操作条件和电极配置对MFC性能的影响。在配备反硝化生物阴极的MFC中，阴极上的生物硝酸盐还原速率是发电的限速步骤。以颗粒石墨填充床为电极的MFC发电达到730mW/m3，阳极室有机物（醋酸酯）降解，阴极室反硝化。在阴极生物膜中，以反硝化副球菌等自养反硝化细菌为主。

Fundamental characteristics of microbial fuel cells (MFCs) equipped with denitrifying biocathodes under anoxic condition were experimentally investigated. The characteristics of cathodic reaction, microbial community in cathodic biofilm, the effects of operational condition and electrode configuration on MFC performance were discussed on the basis of the experimental results obtained. Biological nitrate reduction rate on cathode was rate-limiting step for power generation in the MFC equipped with denitrifying biocathodes. The power generation of MFC using a packed bed of granular graphite as electrodes reached 730mW/m3 with organic matter (acetate) degradation in anode compartment and denitrification in cathode compartment. In cathodic biofilm, autotrophic denitrifying bacteria such as Paracoccus denitrificans were predominantly detected.