Fluidized granular activated carbon electrode for efficient microbial electrosynthesis of acetate from carbon dioxide.

摘要: Abstract The electricity-driven bioreduction of carbon dioxide to multi-carbon organic compounds, particularly acetate, has been achieved in microbial electrosynthesis (MES). MES performance can be limited by the amount cathode surface area available for biofilm formation and slow substrate mass transfer. Here, a fluidized three-dimensional electrode, containing granular activated (GAC) particles, was constructed via MES. volumetric acetate production rate increased 2.8 times through with 16 g L−1 GAC (0.14 g L−1 d-1) compared that control (no GAC), final concentration reached 3.92 g L−1 within 24 days. Electrochemical, scanning electron microscopy, community analyses suggested might improve accelerating direct indirect (via H2) transfer because could provide high electrode favorable transport. This study attempted efficiency presented promising opportunities scale-up.