以厌氧污泥为原始菌群来源构建混菌微生物燃料电池·840 h后,最大功率密度达到1900 mW·m-2.从该电池阳极分离纯化出一株产电菌,细胞形态为球形,生长特性为兼性厌氧,经鉴定属于葡萄球菌属(Staphylococcus),命名为Staphylococcus NJUST-1.以Staphylococcus NJUST-1为微生物构建单菌微生物燃料电池,稳定后最大功率密度达到520 mW·m-2·比混菌电池要低许多,同时极化曲线显示,电流密度达到0.18 mA· cm-2后,电压开始快速下降,表明在较大电流下N JUST-1产电受到阻碍.NJ UST-1代谢1.0g·L-1葡萄糖5～10 h内,外路电压维持在较高水平；葡萄糖浓度降低到0.1g·L-1时,电压明显下降；葡萄糖浓度接近0后,仍能检测到电压.%A microbial fuel cell (MFC)was fabricated with the original strains from anaerobic sludge,840 h later,the maximum power density reached 1900 mW·m-2. Then an electricity generation bacterium was isolated from anode for which the cells were spherical and the growth pattern was facultative anaerobic. The strain was identified belong to Staphylococcus and was named as Staphylococcus NJUST-1. Then a single bacterium MFC was made using Staphylococcus NJUST-1, and its stable maximum power density reached 520 mW·m-2 ,much lower than that of the mixed bacteria MFC,and the polarization curve showed that the voltage rapidly declined when the current density reached 0. 18 mA·cm-2,which indicated that the electricity generation performance of NJUST-1 was hampered at a higher current. Metabolizing 1. 0 g·L-1 glucose for 5～15 h,the external voltage still maintained at a high level,but significantly reduced when the glucose concentration was lower than 0. 1 g·L-1 ,and it could be detected yet with the glucose concentration approaching zero.
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