异养反硝化微生物燃料电池脱氮产电性能研究

Research on the heterotrophic denitrification in microbial fuel cells affecting denitrification electrogenesis capacity

构建了双室型微生物燃料电池(MFC),探讨了异养反硝化底物降解、产电特性和指示作用。结果表明:有机物是影响异养反硝化微生物燃料电池产电和污水处理性能的关键影响因素,未加入有机物时MFC产电仅有10 m V;MFC的电信号能较好地反映亚硝氮、COD基质浓度的变化情况,因此可用电压变化指示底物的降解过程;在不考虑菌体水解、同化作用所引起氨氮浓度的增加问题时,亦可用时间来指示氨氮的降解过程。

A double-chamber type o f microbial fuel cell（MFC） has been set up,and heterotrophic denitrification substrate degradation,electrogenesis capacity and indication effect are discussed. The results show that organic matter is the critical influential factor that affects the electrogenesis capacity and wastewater treatment capacity of the heterotrophic denitrification microbial fuel cell. When organic matter is not added,the MFC electrogenesis is only 10 m V. MFC electrical signal can better reflect the changes of nitrite nitrogen and COD substrate concentration.Therefore,the voltage change can be used for indicating substrate degradation process,and time can be used for indicating the degradation process of ammonia nitrogen too,while the increase of ammonia nitrogen concentration caused by bacterial hydrolysis and assimilation is not considered.