Syntrophic interactions between H2-scavenging and anode-respiring bacteria can improve current density in microbial electrochemical cells

- High current density (14.6 A/m2) can be achieved from the MEC fed with digestate.
- COD removal was improved up to 96% in the MEC.
- Methane production was as small as ∼3% of removed COD.
- Homoacetogens outcompeted methanogens due to the syntrophy with ARB.