Fig. 2From: Electrode-assisted acetoin production in a metabolically engineered Escherichia coli strainSchematic image of the bioelectrochemical reactor. The reactor setup had a volume of 23 ml and a 40 cm2 working electrode placed at the bottom. The polycarbonate lid provided ports for sampling the reference electrode as well as the counter electrode compartment. This design comprised a high surface-to-volume ratio with minimal distance between the electrodesBack to article page