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Hydrogen production from domestic wastewater was examined using a plain carbon electrode or graphite-granule packed-bed bioelectrochemically assisted microbial reactors (BEAMRs) capable of continuous or intermittent hydrogen release. When graphite granules were added to the anode chamber (packed-bed mode) current density was increased when the domestic wastewater had a high initial chemical oxygen demand (COD>360mg/L), and produced a maximum Coulombic efficiency of 26% (applied voltage of 0.41V) and a maximum hydrogen recovery of 42% (applied voltage of 0.5V). The packed-bed system successfully treated the wastewater, with removal efficiencies of biochemical oxygen demand (BOD), chemical oxygen demand (COD), and dissolved organic carbon (DOC) in the range of 87–100%. The final BOD of the treated wastewater was always reduced to less than 7.0±0.2mg/L. Overall …