Pre enriched electrodes, biomass retention, and bioelectrochemical processes collectively enhance methane production in integrated microbial electrolysis cell-anaerobic digestion system

The present study aims to investigate how integrating microbial electrolysis cells (MECs) with anaerobic digestion (AD) can enhance AD performance, focusing on the roles of bioelectrochemical processes, biomass retention, and direct interspecies electron transfer (DIET). Four sets of MEC-AD reactors were operated under different electrode pre-enrichment and circuit conditions, alongside a conventional AD reactor as a control