An isolate, designated strain SD‐1, was obtained from a biofilm dominated by Geobacter sulfurreducens in a microbial fuel cell. The electrochemical activity of strain SD‐1 was compared with type strains, G. sulfurreducens PCA and Geobacter metallireducens GS‐15, and a mixed culture in microbial electrolysis cells. SD‐1 produced a maximum current density of 290 ± 29 A m⁻³ in a high‐concentration phosphate buffer solution (PBS‐H, 200 mM). This current density was significantly higher than that produced by the mixed culture (189 ± 44 A m⁻³) or the type strains (< 70 A m⁻³). In a highly saline water (SW; 50 mM PBS and 650 mM NaCl), current by SD‐1 (158 ± 4 A m⁻³) was reduced by 28% compared with 50 mM PBS (220 ± 4 A m⁻³), but it was still higher than that of the mixed culture (147 ± 19 A m⁻³), and strains PCA and GS‐15 did not produce any current. Electrochemical tests showed that the improved performance of SD‐1 was due to its lower charge transfer resistance and more negative potentials produced at higher current densities. These results show that the electrochemical activity of SD‐1 was significantly different than other Geobacter strains and mixed cultures in terms of its salt tolerance.

中文翻译：

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Geobacter sp。SD-1在高盐浓度溶液中具有增强的电化学活性。

的分离物，命名为菌株SD-1是从由主导的生物膜获得ģ eobacter硫还原在微生物燃料电池。将SD-1菌株的电化学活性与G菌株进行了比较。硫还原 PCA和ģ eobacter metallireducens  GS-15，和在微生物电解细胞的混合培养物。SD-1在高浓度磷酸盐缓冲溶液（PBS-H，200 mM）中产生的最大电流密度为290±29 A m ^-3。该电流密度显着高于混合培养（189±44 A m ^-3）或典型菌株（<70 A m ^-3）。在高盐度的水中（SW； 50 mM PBS和650 mM NaCl），与50 mM PBS（220±4 A m ^-3）相比，SD-1（158±4 A m ^-3）的电流减少了28％。，但仍高于混合培养（147±19 A m ^-3），PCA和GS-15菌株不产生任何电流。电化学测试表明，SD-1的性能提高是由于其较低的电荷转移电阻和较高的电流密度产生了更多的负电势。这些结果表明，SD-1的电化学活性在耐盐性方面与其他G. Geobacter菌株和混合培养物显着不同。