Spatially Resolved Electron Transport through Anode‐Respiring Geobacter sulfurreducens Biofilms: Controls and Constraints

Abstract

Invited for this month's cover picture is the group of Prof. Christof Meile at the University of Georgia, USA and Prof. Victoria Orphan at the California Institute of Technology, USA. The Front Cover shows characteristic images of G. sulfurreducens biofilms on the anode surface (gray), the distribution of anabolic activity (yellow=high, blue=low), and the equation central to the description of electron transfer and simulated activity profiles. Read the full text of the Article at 10.1002/celc.202100111.

Periodic step polarization accelerates electron recovery by electroactive biofilms (EABs)

“…Regarding the new periodic step polarization, the influence of periodic discharging at a high potential on the composition of EPS is worth investigating. On one hand, a high anode potential was shown to induce the metabolic activity of G. sulfurreducens further away from the anode (He et al, 2021); on the other hand, prolonged cultivation at more oxidized anode potential has been shown to increase polysaccharide content, commonly thought to be nonconductive, and decrease protein content in the biofilm (Yang et al, 2019). Hence, future studies at longer duration are required to further examine the stimulating effect.…”

“…sulfurreducens further away from the anode (He et al, 2021); on the other hand, prolonged cultivation at more oxidized anode potential has been shown to increase polysaccharide content, commonly thought to be nonconductive, and decrease protein content in the biofilm (Yang et al, 2019). Hence, future studies at…”