| 초록 |
Electrodes-driven biologic electron transfer has the potential to convert CO2 into muti-carbon chemicals via MES. The electron transfer is mainly achieved by the redox reaction between microbial and electrode surface. In this process, the biofilm on the electrode surface plays an important role. Most previous studies show, dense and well-developed biofilms can significantly improve electron transfer efficiency between microbial and electrode surface. Therefore, it is essential to formation of dense biofilms for MES to improve electron transfer and production. However, this idea is only theoretically feasible, but in practice, dense biofilms are rarely observed on the electrode surface from mixed inocula for MES. In this study, we developed a safe-house carbon felt electrode to actively protect biofilm formation in MES, and observed dense biofilm on the unmodified electrode surface for the first time from mixed inocula for MES. The dense biofilm improves the electron recovery efficiency of the MES. Through further protection of the biofilm formation, that significantly increase 80% acetate production and simultaneous significantly increase 34% energy efficiency in average. |
