| 초록 |
To alleviate the greenhouse effect and climate change, it is of great importance to develop sustainable CO2 capture and utilization. The microbial electrosynthesis (MES) has been highlighted to convert CO2 to value added metabolites and intermediate chemicals by using electrochemically active bacteria as biocatalyst and electricity as reducing power. However, the MES only produced simple organic acids or alcohols from CO2. In this study, we presented a novel bioelectrosynthetic pathway for polyhydroxybutyrate (PHB) production using a photosynthetic bacteria, Rhodobacter sphaeroides. The electrode attached R. sphaeroides directly uptakes electrons from the electrode surface, while the suspended Rhodobacter sphaeroides utilize the electrochemically evolved hydrogen as electron mediator to convert CO2 to polyhydroxybutyrate (PHB). The results show that MES-driven electrons and protons transfer enabled direct conversion of CO2 into higher-value added organic matter such as PHB. |
