介体微生物燃料电池脱氨产电性能的研究

摘要

A three chamber microbial fuel cells(MFC),employing escherichia coli (E .coil)as anode catalyst,was designed.Its electricity generation and ammonia nitrogen removal were in-vestigated in mediator-less,new methylene blue(NMB)as mediator and neutral red(NR)as me-diator conditions.The results show that mediators improved open circuit voltage(VOC)of MFC and reduced the time of reaching steady-state VOC.With NMB mediator,VOC of MFC achieved a stable value more easily.VOC of MFC with NR mdeiator was higher than that of MFC with NMB mdeiator.Meditators reduced denitrification time of MFC (ammonia nitrogen removal effi-ciency of 90%),besides,denitrification time of MFC with NMB was shorter.VOC was higher with NR as mediator, but VOC had slower attenuation and better stability with NMB as mediater.%以三室微生物燃料电池(MFC)为研究对象,采用大肠杆菌(E.coli)作阳极催化剂,比较了在无外加中介体、以中性红(NR)做中介体、以新亚甲基蓝(NMB)做中介体3种情况下的脱氨氮产电性能.结果表明:添加中介体可以提高MFC的开路电压,缩短开路电压达到稳定的时间,以NMB做中介体MFC的开路电压更容易达到稳定值,而以NR做中介体MFC达到的稳定开路电压较前者高.添加中介体能缩短MFC的脱氨氮时间(脱氨氮效率达90%),以NMB做中介体的MFC脱氨氮所需时间更短.以NR做中介体MFC的输出电压更高,但随着时间的延长,以NMB做中介体MFC相比于前者输出电压衰减得慢,稳定性更好.