Continuous shear stress alters metabolism, mass-transport, and growth in electroactive biofilms independent of surface substrate transport.

ABSTRACT: Electroactive bacteria such as Geobacter sulfurreducens and Shewanella onedensis produce electrical current during their respiration; this has been exploited in bioelectrochemical systems. These bacteria form thicker biofilms and stay more active than soluble-respiring bacteria biofilms because their electron acceptor is always accessible. In bioelectrochemical systems such as microbial fuel cells, corrosion-resistant metals uptake current from the bacteria, producing power. While beneficial for engineering applications, collecting current using corrosion resistant metals induces pH stress in the biofilm, unlike the naturally occurring process where a reduced metal combines with protons released during respiration. To reduce pH stress, some bioelectrochemical systems use forced convection

SUBMITTER: Jones AD 

PROVIDER: S-EPMC6385357 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature