TY - JOUR
T1 - Production of hydrogen from domestic wastewater using a bioelectrochemically assisted microbial reactor (BEAMR)
AU - Ditzig, Jenna
AU - Liu, Hong
AU - Logan, Bruce E.
N1 - Funding Information:
This research was supported by National Science Foundation Grant BES-0401885. We thank S.-E. Oh for assistance with MFC experiments.
PY - 2007/9
Y1 - 2007/9
N2 - 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 > 360 mg / L), and produced a maximum Coulombic efficiency of 26% (applied voltage of 0.41 V) and a maximum hydrogen recovery of 42% (applied voltage of 0.5 V). 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 ± 0.2 mg / L. Overall hydrogen production based on COD removal was a maximum of 0.0125 mg - H2 / mg - COD (154 mL - H2 / g - COD versus a maximum possible conversion of 0.126 mg - H2 / mg - COD), with an energy requirement equivalent to 0.0116 mg - H2 / mg - COD, producing an 8% net yield of H2. These results demonstrate that a wastewater treatment based on a BEAMR reactor is feasible, but improvements are needed in hydrogen recoveries and Coulombic efficiencies to increase the overall hydrogen yield.
AB - 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 > 360 mg / L), and produced a maximum Coulombic efficiency of 26% (applied voltage of 0.41 V) and a maximum hydrogen recovery of 42% (applied voltage of 0.5 V). 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 ± 0.2 mg / L. Overall hydrogen production based on COD removal was a maximum of 0.0125 mg - H2 / mg - COD (154 mL - H2 / g - COD versus a maximum possible conversion of 0.126 mg - H2 / mg - COD), with an energy requirement equivalent to 0.0116 mg - H2 / mg - COD, producing an 8% net yield of H2. These results demonstrate that a wastewater treatment based on a BEAMR reactor is feasible, but improvements are needed in hydrogen recoveries and Coulombic efficiencies to increase the overall hydrogen yield.
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U2 - 10.1016/j.ijhydene.2007.02.035
DO - 10.1016/j.ijhydene.2007.02.035
M3 - Article
AN - SCOPUS:34548137689
SN - 0360-3199
VL - 32
SP - 2296
EP - 2304
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 13
ER -
